Phase noise management of out-of-band repeater

ABSTRACT

A first wireless device transmits one or more transmissions for a second wireless device to a repeater for repetition to the second wireless device; adjusts a repeater operation based on a phase noise in transmission between the first wireless device and the repeater; and communicates with at least one of the repeater or the second wireless device based on the adjusted repeater operation. A repeater receives from a first wireless device, a request for the repeater to report a phase noise in transmissions between the first wireless device and the repeater for repetition with a second wireless device; and transmits a report of the phase noise to the first wireless device based on the request. A repeater receives, from a first wireless device, a transmission for repetition with a second wireless device; and transmits the repetition of the transmission to the second wireless device with a phase noise compensation.

CROSS REFERENCE TO RELATED APPLICATION(S)

This application is a divisional of U.S. application Ser. No.17/451,625, entitled “Phase Noise Management of Out-of-Band Repeater”and filed on Oct. 20, 2021, which is expressly incorporated by referenceherein in its entirety.

TECHNICAL FIELD

The present disclosure relates generally to communication systems, andmore particularly, to wireless communication including a repeater.

INTRODUCTION

Wireless communication systems are widely deployed to provide varioustelecommunication services such as telephony, video, data, messaging,and broadcasts. Typical wireless communication systems may employmultiple-access technologies capable of supporting communication withmultiple users by sharing available system resources. Examples of suchmultiple-access technologies include code division multiple access(CDMA) systems, time division multiple access (TDMA) systems, frequencydivision multiple access (FDMA) systems, orthogonal frequency divisionmultiple access (OFDMA) systems, single-carrier frequency divisionmultiple access (SC-FDMA) systems, and time division synchronous codedivision multiple access (TD-SCDMA) systems.

These multiple access technologies have been adopted in varioustelecommunication standards to provide a common protocol that enablesdifferent wireless devices to communicate on a municipal, national,regional, and even global level. An example telecommunication standardis 5G New Radio (NR). 5G NR is part of a continuous mobile broadbandevolution promulgated by Third Generation Partnership Project (3GPP) tomeet new requirements associated with latency, reliability, security,scalability (e.g., with Internet of Things (IoT)), and otherrequirements. 5G NR includes services associated with enhanced mobilebroadband (eMBB), massive machine type communications (mMTC), andultra-reliable low latency communications (URLLC). Some aspects of 5G NRmay be based on the 4G Long Term Evolution (LTE) standard. There existsa need for further improvements in 5G NR technology. These improvementsmay also be applicable to other multi-access technologies and thetelecommunication standards that employ these technologies.

BRIEF SUMMARY

The following presents a simplified summary of one or more aspects inorder to provide a basic understanding of such aspects. This summary isnot an extensive overview of all contemplated aspects, and is intendedto neither identify key or critical elements of all aspects nordelineate the scope of any or all aspects. Its sole purpose is topresent some concepts of one or more aspects in a simplified form as aprelude to the more detailed description that is presented later.

In an aspect of the disclosure, a method, a computer-readable medium,and an apparatus are provided for wireless communication at a firstwireless device. The apparatus transmits one or more transmissions for asecond wireless device to a repeater for repetition to the secondwireless device; adjusts a repeater operation based on a phase noise intransmission between the first wireless device and the repeater; andcommunicates with at least one of the repeater or the second wirelessdevice based on the adjusted repeater operation.

In another aspect of the disclosure, a method, a computer-readablemedium, and an apparatus are provided for wireless communication at arepeater. The repeater receives from a first wireless device, a requestfor the repeater to report a phase noise in transmissions between thefirst wireless device and the repeater for repetition with a secondwireless device; and transmits a report of the phase noise to the firstwireless device based on the request.

In another aspect of the disclosure, a method, a computer-readablemedium, and an apparatus are provided for wireless communication at arepeater. The repeater receives, from a first wireless device, atransmission for repetition with a second wireless device; and transmitsthe repetition of the transmission to the second wireless device with aphase noise compensation.

To the accomplishment of the foregoing and related ends, the one or moreaspects comprise the features hereinafter fully described andparticularly pointed out in the claims. The following description andthe annexed drawings set forth in detail certain illustrative featuresof the one or more aspects. These features are indicative, however, ofbut a few of the various ways in which the principles of various aspectsmay be employed, and this description is intended to include all suchaspects and their equivalents.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a diagram illustrating an example of a wireless communicationssystem and an access network, in accordance with aspects presentedherein.

FIG. 2A is a diagram illustrating an example of a first frame, inaccordance with various aspects of the present disclosure.

FIG. 2B is a diagram illustrating an example of DL channels within asubframe, in accordance with various aspects of the present disclosure.

FIG. 2C is a diagram illustrating an example of a second frame, inaccordance with various aspects of the present disclosure.

FIG. 2D is a diagram illustrating an example of UL channels within asubframe, in accordance with various aspects of the present disclosure.

FIG. 3 is a diagram illustrating an example of a base station and userequipment (UE) in an access network with a repeater, in accordance withaspects presented herein.

FIG. 4A illustrates a communication system including a repeater, inaccordance with aspects presented herein.

FIG. 4B is a diagram of example components of a repeater, in accordancewith aspects presented herein.

FIG. 5 is a communication flow between a base station, a repeater, and aUE, in accordance with aspects presented herein.

FIG. 6 is a communication flow between a base station, a repeater, and aUE, in accordance with aspects presented herein.

FIG. 7 is a communication flow between a base station, a repeater, and aUE, in accordance with aspects presented herein.

FIG. 8 is a communication flow between a base station, a repeater, and aUE, in accordance with aspects presented herein.

FIGS. 9A, 9B, 9C, and 9D illustrate various aspects of an additionalreference signal multiplexed with a UE signal, in accordance withaspects presented herein.

FIGS. 10A and 10B illustrate example aspects of reference signalinsertion and removal at a repeater, in accordance with aspectspresented herein.

FIGS. 11A and 11B are flowchart of a method of wireless communication,at a base station in accordance with aspects presented herein.

FIG. 12 is a diagram illustrating an example of a hardwareimplementation for an example apparatus, in accordance with aspectspresented herein.

FIGS. 13A and 13B are flowchart of a method of wireless communication ata repeater, in accordance with aspects presented herein.

FIGS. 14A and 14B are flowchart of a method of wireless communication ata repeater, in accordance with aspects presented herein.

FIG. 15 is a diagram illustrating an example of a hardwareimplementation for an example apparatus, in accordance with aspectspresented herein.

DETAILED DESCRIPTION

In certain situations, direct communication between a first wirelessdevice and a second wireless device may be difficult because there is ablockage between the devices or because the second wireless device isout of range of the first wireless device. In such scenarios, a repeaterdevice may be configured to extend the coverage of the second wirelessdevice by amplifying the signals transmitted between the first wirelessdevice and the second wireless device. As an example, a base station maytransmit downlink communication for a UE to a repeater for repetition tothe UE, and may receive repetitions of uplink transmissions of the UEfrom the repeater. A link between the base station and the repeater maybe referred to as a fronthaul link, and a link between the repeater andthe UE may be referred to as an access link.

In some examples, the repeater may support control by a control node,such as a base station, so that a configuration of the repeater can bedynamically adjusted or reconfigured depending on the conditions of thecommunication system. An out-of-band repeater may operate in differentfrequency ranges over a fronthaul link with a base station and an accesslink with a UE. For example, the repeater may transmit and receivesignals on the fronthaul link with the base station in FR2, and maytransmit and receive signals on the access link with the UE in FR1. Insome aspects, the repeater may shift the frequency of the signal that itforwards, or repeats, between the base station and the UE. For example,when repeating/forwarding an uplink transmission from the UE to the basestation, the repeater may shift the center frequency of the uplinksignal from FR1 to FR2 before forwarding the signal to the base station.The repeater may shift the frequency without changing the numerology ofthe forwarded signal. The downlink signals for the UE and the uplinksignals from the UE may be based on FR1 numerologies (e.g., a 15 kHZ or30 kHz subcarrier spacing (SCS)).

In some aspects, phase noise may be introduced in signals based onhigher frequency (e.g., FR2) components such as local oscillators. Therepeater and the base station may experience phase noise in the FR2signals. The phase noise may affect the UE's signal, which has a smallerSCS and longer symbol duration. The UE may not have a way to compensatefor the added phase noise that is introduced based on the signal betweenthe base station and the repeater.

Aspects presented herein provide techniques for addressing or correctingphase noise in the UE's signal, e.g., due to the FR2 signal between therepeater and the base station. In some aspects, a base station maydetermine a level of the phase noise on the UE's sub-6 signal and mayadjust a repeater configuration or stop using a repeater in responsephase noise level. The base station may measure a phase noise in theuplink signal forwarded by the repeater or may receive a report of thephase noise from the repeater. In some aspects, the repeater may applycompensation for the phase noise before forwarding the UE's signal.

The detailed description set forth below in connection with the appendeddrawings is intended as a description of various configurations and isnot intended to represent the only configurations in which the conceptsdescribed herein may be practiced. The detailed description includesspecific details for the purpose of providing a thorough understandingof various concepts. However, it will be apparent to those skilled inthe art that these concepts may be practiced without these specificdetails. In some instances, well known structures and components areshown in block diagram form in order to avoid obscuring such concepts.

Several aspects of telecommunication systems will now be presented withreference to various apparatus and methods. These apparatus and methodswill be described in the following detailed description and illustratedin the accompanying drawings by various blocks, components, circuits,processes, algorithms, etc. (collectively referred to as “elements”).These elements may be implemented using electronic hardware, computersoftware, or any combination thereof. Whether such elements areimplemented as hardware or software depends upon the particularapplication and design constraints imposed on the overall system.

By way of example, an element, or any portion of an element, or anycombination of elements may be implemented as a “processing system” thatincludes one or more processors. Examples of processors includemicroprocessors, microcontrollers, graphics processing units (GPUs),central processing units (CPUs), application processors, digital signalprocessors (DSPs), reduced instruction set computing (RISC) processors,systems on a chip (SoC), baseband processors, field programmable gatearrays (FPGAs), programmable logic devices (PLDs), state machines, gatedlogic, discrete hardware circuits, and other suitable hardwareconfigured to perform the various functionality described throughoutthis disclosure. One or more processors in the processing system mayexecute software. Software shall be construed broadly to meaninstructions, instruction sets, code, code segments, program code,programs, subprograms, software components, applications, softwareapplications, software packages, routines, subroutines, objects,executables, threads of execution, procedures, functions, etc., whetherreferred to as software, firmware, middleware, microcode, hardwaredescription language, or otherwise.

Accordingly, in one or more example embodiments, the functions describedmay be implemented in hardware, software, or any combination thereof. Ifimplemented in software, the functions may be stored on or encoded asone or more instructions or code on a computer-readable medium.Computer-readable media includes computer storage media. Storage mediamay be any available media that can be accessed by a computer. By way ofexample, and not limitation, such computer-readable media can comprise arandom-access memory (RAM), a read-only memory (ROM), an electricallyerasable programmable ROM (EEPROM), optical disk storage, magnetic diskstorage, other magnetic storage devices, combinations of the types ofcomputer-readable media, or any other medium that can be used to storecomputer executable code in the form of instructions or data structuresthat can be accessed by a computer.

While aspects and implementations are described in this application byillustration to some examples, those skilled in the art will understandthat additional implementations and use cases may come about in manydifferent arrangements and scenarios. Aspects described herein may beimplemented across many differing platform types, devices, systems,shapes, sizes, and packaging arrangements. For example, implementationsand/or uses may come about via integrated chip implementations and othernon-module-component based devices (e.g., end-user devices, vehicles,communication devices, computing devices, industrial equipment,retail/purchasing devices, medical devices, artificial intelligence(AI)-enabled devices, etc.). While some examples may or may not bespecifically directed to use cases or applications, a wide assortment ofapplicability of described aspects may occur. Implementations may rangea spectrum from chip-level or modular components to non-modular,non-chip-level implementations and further to aggregate, distributed, ororiginal equipment manufacturer (OEM) devices or systems incorporatingone or more aspects of the described aspects. In some practicalsettings, devices incorporating described aspects and features may alsoinclude additional components and features for implementation andpractice of claimed and described aspect. For example, transmission andreception of wireless signals necessarily includes a number ofcomponents for analog and digital purposes (e.g., hardware componentsincluding antenna, RF-chains, power amplifiers, modulators, buffer,processor(s), interleaver, adders/summers, etc.). It is intended thataspects described herein may be practiced in a wide variety of devices,chip-level components, systems, distributed arrangements, aggregated ordisaggregated components, end-user devices, etc. of varying sizes,shapes, and constitution.

FIG. 1 is a diagram illustrating an example of a wireless communicationssystem and an access network 100. The wireless communications system(also referred to as a wireless wide area network (WWAN)) includes basestations 102 and 180, UEs 104, an Evolved Packet Core (EPC) 160, andanother core network 190 (e.g., a 5G Core (5GC)). The base stations 102may include macrocells (high power cellular base station) and/or smallcells (low power cellular base station). The macrocells include basestations. The small cells include femtocells, picocells, and microcells.

The wireless communication system of FIG. 1 may further includerepeaters 113 that forward communication between a base station 102/180and a UE 104. The repeater 113 may be an analog repeater that receives,amplifies, and forwards a signal between the base station 102/180 and UE104 over communication links 120. As an example, the repeater 113 mayprovide additional coverage for a base station 102/180 that may have asignal to a UE 104 at least partially blocked by a blockage 117. Therepeater 113 may include a component that is capable of receivingcontrol signaling from a control node (e.g., the base station 102, 180)and a repeating unit that forwards the communication with one or moreparameters based on the control signaling. In some examples, therepeating may be referred to as a remote unit. In some examples, therepeater may be referred to as a pass-through repeater.

As described herein, the control node may include the base station 102,180, the IAB node 111, etc. The first wireless device may include thebase station 102, 180, the IAB node 111, the UE 104, or anotherrepeater. The second wireless device may include the base station 102,180, the IAB node 111, the UE 104, or another repeater.

In some aspects, a base station 102 or 180, UE 104, or IAB node 111, maytransmit transmissions for a second wireless device to a repeater 113for repetition to the second wireless device (e.g., a UE 104, basestation 102/180, IAB node 111, etc.). Similarly, the base station 102 or180, UE 104, or IAB node 111 may receive repeated transmissions from thesecond wireless device via the repeater 113. A base station 102/180, UE104, IAB node 111, or other device may include a phase noise component199 configured to adjust a repeater operation based on a phase noise intransmission between the first wireless device and the repeater 113 andto apply the adjusted repeater operation to communicate with the secondwireless device and/or the repeater. The repeater 113 may include aphase noise component 198 that is configured to receive a request forthe repeater 113 to report a phase noise in transmissions (e.g., betweenthe base station 102/180 and the repeater 113) for repetition to asecond wireless device (e.g., with at least one UE 104) and to transmita report of the phase noise to the first wireless device based on therequest. The phase noise component 198 may be configured to receive atransmission from a first wireless device for repetition to at least onesecond wireless device and to transmit the repetition of thetransmission to the second wireless device with a phase noisecompensation. Although the following description may be focused on 5GNR, the concepts described herein may be applicable to other similarareas, such as LTE, LTE-A, CDMA, GSM, and other wireless technologies.

The base stations 102 configured for 4G LTE (collectively referred to asEvolved Universal Mobile Telecommunications System (UMTS) TerrestrialRadio Access Network (E-UTRAN)) may interface with the EPC 160 throughfirst backhaul links 132 (e.g., S1 interface). The base stations 102configured for 5G NR (collectively referred to as Next Generation RAN(NG-RAN)) may interface with core network 190 through second backhaullinks 184. In addition to other functions, the base stations 102 mayperform one or more of the following functions: transfer of user data,radio channel ciphering and deciphering, integrity protection, headercompression, mobility control functions (e.g., handover, dualconnectivity), inter-cell interference coordination, connection setupand release, load balancing, distribution for non-access stratum (NAS)messages, NAS node selection, synchronization, radio access network(RAN) sharing, multimedia broadcast multicast service (MBMS), subscriberand equipment trace, RAN information management (RIM), paging,positioning, and delivery of warning messages. The base stations 102 maycommunicate directly or indirectly (e.g., through the EPC 160 or corenetwork 190) with each other over third backhaul links 134 (e.g., X2interface). The first backhaul links 132, the second backhaul links 184(e.g., an Xn interface), and the third backhaul links 134 may be wiredor wireless.

In some aspects, a base station 102 or 180 may be referred as a RAN andmay include aggregated or disaggregated components. As an example of adisaggregated RAN, a base station may include a central unit (CU) 106,one or more distributed units (DU) 105, and/or one or more remote units(RU) 109, as illustrated in FIG. 1 . A RAN may be disaggregated with asplit between an RU 109 and an aggregated CU/DU. A RAN may bedisaggregated with a split between the CU 106, the DU 105, and the RU109. A RAN may be disaggregated with a split between the CU 106 and anaggregated DU/RU. The CU 106 and the one or more DUs 105 may beconnected via an F1 interface. A DU 105 and an RU 109 may be connectedvia a fronthaul interface. A connection between the CU 106 and a DU 105may be referred to as a midhaul, and a connection between a DU 105 andan RU 109 may be referred to as a fronthaul. The connection between theCU 106 and the core network may be referred to as the backhaul. The RANmay be based on a functional split between various components of theRAN, e.g., between the CU 106, the DU 105, or the RU 109. The CU may beconfigured to perform one or more aspects of a wireless communicationprotocol, e.g., handling one or more layers of a protocol stack, and theDU(s) may be configured to handle other aspects of the wirelesscommunication protocol, e.g., other layers of the protocol stack. Indifferent implementations, the split between the layers handled by theCU and the layers handled by the DU may occur at different layers of aprotocol stack. As one, non-limiting example, a DU 105 may provide alogical node to host a radio link control (RLC) layer, a medium accesscontrol (MAC) layer, and at least a portion of a physical (PHY) layerbased on the functional split. An RU may provide a logical nodeconfigured to host at least a portion of the PHY layer and radiofrequency (RF) processing. A CU 106 may host higher layer functions,e.g., above the RLC layer, such as a service data adaptation protocol(SDAP) layer, a packet data convergence protocol (PDCP) layer. In otherimplementations, the split between the layer functions provided by theCU, DU, or RU may be different.

An access network may include one or more integrated access and backhaul(IAB) nodes 111 that exchange wireless communication with a UE 104 orother IAB node 111 to provide access and backhaul to a core network. Inan IAB network of multiple IAB nodes, an anchor node may be referred toas an IAB donor. The IAB donor may be a base station 102 or 180 thatprovides access to a core network 190 or EPC 160 and/or control to oneor more IAB nodes 111. The IAB donor may include a CU 106 and a DU 105.IAB nodes 111 may include a DU 105 and a mobile termination (MT). The DU105 of an IAB node 111 may operate as a parent node, and the MT mayoperate as a child node.

The base stations 102 may wirelessly communicate with the UEs 104. Eachof the base stations 102 may provide communication coverage for arespective geographic coverage area 110. There may be overlappinggeographic coverage areas 110. For example, the small cell 102′ may havea coverage area 110′ that overlaps the coverage area 110 of one or moremacro base stations 102. A network that includes both small cell andmacrocells may be known as a heterogeneous network. A heterogeneousnetwork may also include Home Evolved Node Bs (eNBs) (HeNBs), which mayprovide service to a restricted group known as a closed subscriber group(CSG). The communication links 120 between the base stations 102 and theUEs 104 may include uplink (UL) (also referred to as reverse link)transmissions from a UE 104 to a base station 102 and/or downlink (DL)(also referred to as forward link) transmissions from a base station 102to a UE 104. The communication links 120 may use multiple-input andmultiple-output (MIMO) antenna technology, including spatialmultiplexing, beamforming, and/or transmit diversity. The communicationlinks may be through one or more carriers. The base stations 102/UEs 104may use spectrum up to Y MHz (e.g., 5, 10, 15, 20, 100, 400, etc. MHz)bandwidth per carrier allocated in a carrier aggregation of up to atotal of Yx MHz (x component carriers) used for transmission in eachdirection. The carriers may or may not be adjacent to each other.Allocation of carriers may be asymmetric with respect to DL and UL(e.g., more or fewer carriers may be allocated for DL than for UL). Thecomponent carriers may include a primary component carrier and one ormore secondary component carriers. A primary component carrier may bereferred to as a primary cell (PCell) and a secondary component carriermay be referred to as a secondary cell (SCell).

Certain UEs 104 may communicate with each other using device-to-device(D2D) communication link 158. The D2D communication link 158 may use theDL/UL WWAN spectrum. The D2D communication link 158 may use one or moresidelink channels, such as a physical sidelink broadcast channel(PSBCH), a physical sidelink discovery channel (PSDCH), a physicalsidelink shared channel (PSSCH), and a physical sidelink control channel(PSCCH). D2D communication may be through a variety of wireless D2Dcommunications systems, such as for example, WiMedia, Bluetooth, ZigBee,Wi-Fi based on the Institute of Electrical and Electronics Engineers(IEEE) 802.11 standard, LTE, or NR.

The wireless communications system may further include a Wi-Fi accesspoint (AP) 150 in communication with Wi-Fi stations (STAs) 152 viacommunication links 154, e.g., in a 5 GHz unlicensed frequency spectrumor the like. When communicating in an unlicensed frequency spectrum, theSTAs 152/AP 150 may perform a clear channel assessment (CCA) prior tocommunicating in order to determine whether the channel is available.

The small cell 102′ may operate in a licensed and/or an unlicensedfrequency spectrum. When operating in an unlicensed frequency spectrum,the small cell 102′ may employ NR and use the same unlicensed frequencyspectrum (e.g., 5 GHz, or the like) as used by the Wi-Fi AP 150. Thesmall cell 102′, employing NR in an unlicensed frequency spectrum, mayboost coverage to and/or increase capacity of the access network.

The electromagnetic spectrum is often subdivided, based onfrequency/wavelength, into various classes, bands, channels, etc. In 5GNR, two initial operating bands have been identified as frequency rangedesignations FR1 (410 MHz-7.125 GHz) and FR2 (24.25 GHz-52.6 GHz).Although a portion of FR1 is greater than 6 GHz, FR1 is often referredto (interchangeably) as a “sub-6 GHz” band in various documents andarticles. A similar nomenclature issue sometimes occurs with regard toFR2, which is often referred to (interchangeably) as a “millimeter wave”band in documents and articles, despite being different from theextremely high frequency (EHF) band (30 GHz-300 GHz) which is identifiedby the International Telecommunications Union (ITU) as a “millimeterwave” band.

The frequencies between FR1 and FR2 are often referred to as mid-bandfrequencies. Recent 5G NR studies have identified an operating band forthese mid-band frequencies as frequency range designation FR3 (7.125GHz-24.25 GHz). Frequency bands falling within FR3 may inherit FR1characteristics and/or FR2 characteristics, and thus may effectivelyextend features of FR1 and/or FR2 into mid-band frequencies. Inaddition, higher frequency bands are currently being explored to extend5G NR operation beyond 52.6 GHz. For example, three higher operatingbands have been identified as frequency range designations FR4a or FR4-1(52.6 GHz-71 GHz), FR4 (52.6 GHz-114.25 GHz), and FR5 (114.25 GHz-300GHz). Each of these higher frequency bands falls within the EHF band.

With the above aspects in mind, unless specifically stated otherwise, itshould be understood that the term “sub-6 GHz” or the like if usedherein may broadly represent frequencies that may be less than 6 GHz,may be within FR1, or may include mid-band frequencies. Further, unlessspecifically stated otherwise, it should be understood that the term“millimeter wave” or the like if used herein may broadly representfrequencies that may include mid-band frequencies, may be within FR2,FR4, FR4-a or FR4-1, and/or FR5, or may be within the EHF band.

A base station 102, whether a small cell 102′ or a large cell (e.g.,macro base station), may include and/or be referred to as an eNB, gNodeB(gNB), or another type of base station. Some base stations, such as gNB180 may operate in a traditional sub 6 GHz spectrum, in millimeter wavefrequencies, and/or near millimeter wave frequencies in communicationwith the UE 104. When the gNB 180 operates in millimeter wave or nearmillimeter wave frequencies, the gNB 180 may be referred to as amillimeter wave base station. The millimeter wave base station 180 mayutilize beamforming 182 with the UE 104 to compensate for the path lossand short range. The base station 180 and the UE 104 may each include aplurality of antennas, such as antenna elements, antenna panels, and/orantenna arrays to facilitate the beamforming.

The base station 180 may transmit a beamformed signal to the UE 104 inone or more transmit directions 182′. The UE 104 may receive thebeamformed signal from the base station 180 in one or more receivedirections 182″. The UE 104 may also transmit a beamformed signal to thebase station 180 in one or more transmit directions. The base station180 may receive the beamformed signal from the UE 104 in one or morereceive directions. The base station 180/UE 104 may perform beamtraining to determine the best receive and transmit directions for eachof the base station 180/UE 104. The transmit and receive directions forthe base station 180 may or may not be the same. The transmit andreceive directions for the UE 104 may or may not be the same.

The EPC 160 may include a Mobility Management Entity (MME) 162, otherMMEs 164, a Serving Gateway 166, a Multimedia Broadcast MulticastService (MBMS) Gateway 168, a Broadcast Multicast Service Center (BM-SC)170, and a Packet Data Network (PDN) Gateway 172. The MME 162 may be incommunication with a Home Subscriber Server (HSS) 174. The MME 162 isthe control node that processes the signaling between the UEs 104 andthe EPC 160. Generally, the MME 162 provides bearer and connectionmanagement. All user Internet protocol (IP) packets are transferredthrough the Serving Gateway 166, which itself is connected to the PDNGateway 172. The PDN Gateway 172 provides UE IP address allocation aswell as other functions. The PDN Gateway 172 and the BM-SC 170 areconnected to the IP Services 176. The IP Services 176 may include theInternet, an intranet, an IP Multimedia Subsystem (IMS), a PS StreamingService, and/or other IP services. The BM-SC 170 may provide functionsfor MBMS user service provisioning and delivery. The BM-SC 170 may serveas an entry point for content provider MBMS transmission, may be used toauthorize and initiate MBMS Bearer Services within a public land mobilenetwork (PLMN), and may be used to schedule MBMS transmissions. The MBMSGateway 168 may be used to distribute MBMS traffic to the base stations102 belonging to a Multicast Broadcast Single Frequency Network (MBSFN)area broadcasting a particular service, and may be responsible forsession management (start/stop) and for collecting eMBMS relatedcharging information.

The core network 190 may include an Access and Mobility ManagementFunction (AMF) 192, other AMFs 193, a Session Management Function (SMF)194, and a User Plane Function (UPF) 195. The AMF 192 may be incommunication with a Unified Data Management (UDM) 196. The AMF 192 isthe control node that processes the signaling between the UEs 104 andthe core network 190. Generally, the AMF 192 provides QoS flow andsession management. All user Internet protocol (IP) packets aretransferred through the UPF 195. The UPF 195 provides UE IP addressallocation as well as other functions. The UPF 195 is connected to theIP Services 197. The IP Services 197 may include the Internet, anintranet, an IP Multimedia Subsystem (IMS), a Packet Switch (PS)Streaming (PSS) Service, and/or other IP services.

The base station may include and/or be referred to as a gNB, Node B,eNB, an access point, a base transceiver station, a radio base station,a radio transceiver, a transceiver function, a basic service set (BSS),an extended service set (ESS), a transmit reception point (TRP), or someother suitable terminology. The base station 102 provides an accesspoint to the EPC 160 or core network 190 for a UE 104. Examples of UEs104 include a cellular phone, a smart phone, a session initiationprotocol (SIP) phone, a laptop, a personal digital assistant (PDA), asatellite radio, a global positioning system, a multimedia device, avideo device, a digital audio player (e.g., MP3 player), a camera, agame console, a tablet, a smart device, a wearable device, a vehicle, anelectric meter, a gas pump, a large or small kitchen appliance, ahealthcare device, an implant, a sensor/actuator, a display, or anyother similar functioning device. Some of the UEs 104 may be referred toas IoT devices (e.g., parking meter, gas pump, toaster, vehicles, heartmonitor, etc.). The UE 104 may also be referred to as a station, amobile station, a subscriber station, a mobile unit, a subscriber unit,a wireless unit, a remote unit, a mobile device, a wireless device, awireless communications device, a remote device, a mobile subscriberstation, an access terminal, a mobile terminal, a wireless terminal, aremote terminal, a handset, a user agent, a mobile client, a client, orsome other suitable terminology. In some scenarios, the term UE may alsoapply to one or more companion devices such as in a device constellationarrangement. One or more of these devices may collectively access thenetwork and/or individually access the network.

FIG. 2A is a diagram 200 illustrating an example of a first subframewithin a 5G NR frame structure. FIG. 2B is a diagram 230 illustrating anexample of DL channels within a 5G NR subframe. FIG. 2C is a diagram 250illustrating an example of a second subframe within a 5G NR framestructure. FIG. 2D is a diagram 280 illustrating an example of ULchannels within a 5G NR subframe. The 5G NR frame structure may befrequency division duplexed (FDD) in which for a particular set ofsubcarriers (carrier system bandwidth), subframes within the set ofsubcarriers are dedicated for either DL or UL, or may be time divisionduplexed (TDD) in which for a particular set of subcarriers (carriersystem bandwidth), subframes within the set of subcarriers are dedicatedfor both DL and UL. In the examples provided by FIGS. 2A, 2C, the 5G NRframe structure is assumed to be TDD, with subframe 4 being configuredwith slot format 28 (with mostly DL), where D is DL, U is UL, and F isflexible for use between DL/UL, and subframe 3 being configured withslot format 1 (with all UL). While subframes 3, 4 are shown with slotformats 1, 28, respectively, any particular subframe may be configuredwith any of the various available slot formats 0-61. Slot formats 0, 1are all DL, UL, respectively. Other slot formats 2-61 include a mix ofDL, UL, and flexible symbols. UEs are configured with the slot format(dynamically through DL control information (DCI), orsemi-statically/statically through radio resource control (RRC)signaling) through a received slot format indicator (SFI). Note that thedescription infra applies also to a NR frame structure that is TDD.

FIGS. 2A-2D illustrate a frame structure, and the aspects of the presentdisclosure may be applicable to other wireless communicationtechnologies, which may have a different frame structure and/ordifferent channels. A frame (10 ms) may be divided into 10 equally sizedsubframes (1 ms). Each subframe may include one or more time slots.Subframes may also include mini-slots, which may include 7, 4, or 2symbols. Each slot may include 14 or 12 symbols, depending on whetherthe cyclic prefix (CP) is normal or extended. For normal CP, each slotmay include 14 symbols, and for extended CP, each slot may include 12symbols. The symbols on DL may be CP orthogonal frequency divisionmultiplexing (OFDM) (CP-OFDM) symbols. The symbols on UL may be CP-OFDMsymbols (for high throughput scenarios) or discrete Fourier transform(DFT) spread OFDM (DFT-s-OFDM) symbols (also referred to as singlecarrier frequency-division multiple access (SC-FDMA) symbols) (for powerlimited scenarios; limited to a single stream transmission). The numberof slots within a subframe is based on the CP and the numerology. Thenumerology defines the subcarrier spacing (SCS) and, effectively, thesymbol length/duration, which is equal to 1/SCS.

SCS μ Δƒ = 2^(μ) · 15 [kHz] Cyclic prefix 0 15 Normal 1 30 Normal 2 60Normal, Extended 3 120 Normal 4 240 Normal

For normal CP (14 symbols/slot), different numerologies μ 0 to 4 allowfor 1, 2, 4, 8, and 16 slots, respectively, per subframe. For extendedCP, the numerology 2 allows for 4 slots per subframe. Accordingly, fornormal CP and numerology μ, there are 14 symbols/slot and 2^(μ)slots/subframe. The subcarrier spacing may be equal to 2^(μ)*15 kHz,where μ is the numerology 0 to 4. As such, the numerology μ=0 has asubcarrier spacing of 15 kHz and the numerology μ=4 has a subcarrierspacing of 240 kHz. The symbol length/duration is inversely related tothe subcarrier spacing. FIGS. 2A-2D provide an example of normal CP with14 symbols per slot and numerology μ=2 with 4 slots per subframe. Theslot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and thesymbol duration is approximately 16.67 μs. Within a set of frames, theremay be one or more different bandwidth parts (BWPs) (see FIG. 2B) thatare frequency division multiplexed. Each BWP may have a particularnumerology and CP (normal or extended).

A resource grid may be used to represent the frame structure. Each timeslot includes a resource block (RB) (also referred to as physical RBs(PRBs)) that extends 12 consecutive subcarriers. The resource grid isdivided into multiple resource elements (REs). The number of bitscarried by each RE depends on the modulation scheme.

As illustrated in FIG. 2A, some of the REs carry reference (pilot)signals (RS) for the UE. The RS may include demodulation RS (DM-RS)(indicated as R for one particular configuration, but other DM-RSconfigurations are possible) and channel state information referencesignals (CSI-RS) for channel estimation at the UE. The RS may alsoinclude beam measurement RS (BRS), beam refinement RS (BRRS), and phasetracking RS (PT-RS).

FIG. 2B illustrates an example of various DL channels within a subframeof a frame. The physical downlink control channel (PDCCH) carries DCIwithin one or more control channel elements (CCEs) (e.g., 1, 2, 4, 8, or16 CCEs), each CCE including six RE groups (REGs), each REG including 12consecutive REs in an OFDM symbol of an RB. A PDCCH within one BWP maybe referred to as a control resource set (CORESET). A UE is configuredto monitor PDCCH candidates in a PDCCH search space (e.g., common searchspace, UE-specific search space) during PDCCH monitoring occasions onthe CORESET, where the PDCCH candidates have different DCI formats anddifferent aggregation levels. Additional BWPs may be located at greaterand/or lower frequencies across the channel bandwidth. A primarysynchronization signal (PSS) may be within symbol 2 of particularsubframes of a frame. The PSS is used by a UE 104 to determinesubframe/symbol timing and a physical layer identity. A secondarysynchronization signal (SSS) may be within symbol 4 of particularsubframes of a frame. The SSS is used by a UE to determine a physicallayer cell identity group number and radio frame timing. Based on thephysical layer identity and the physical layer cell identity groupnumber, the UE can determine a physical cell identifier (PCI). Based onthe PCI, the UE can determine the locations of the DM-RS. The physicalbroadcast channel (PBCH), which carries a master information block(MIB), may be logically grouped with the PSS and SSS to form asynchronization signal (SS)/PBCH block (also referred to as SS block(SSB)). The MIB provides a number of RBs in the system bandwidth and asystem frame number (SFN). The physical downlink shared channel (PDSCH)carries user data, broadcast system information not transmitted throughthe PBCH such as system information blocks (SIBs), and paging messages.

As illustrated in FIG. 2C, some of the REs carry DM-RS (indicated as Rfor one particular configuration, but other DM-RS configurations arepossible) for channel estimation at the base station. The UE maytransmit DM-RS for the physical uplink control channel (PUCCH) and DM-RSfor the physical uplink shared channel (PUSCH). The PUSCH DM-RS may betransmitted in the first one or two symbols of the PUSCH. The PUCCHDM-RS may be transmitted in different configurations depending onwhether short or long PUCCHs are transmitted and depending on theparticular PUCCH format used. The UE may transmit sounding referencesignals (SRS). The SRS may be transmitted in the last symbol of asubframe. The SRS may have a comb structure, and a UE may transmit SRSon one of the combs. The SRS may be used by a base station for channelquality estimation to enable frequency-dependent scheduling on the UL.

FIG. 2D illustrates an example of various UL channels within a subframeof a frame. The PUCCH may be located as indicated in one configuration.The PUCCH carries uplink control information (UCI), such as schedulingrequests, a channel quality indicator (CQI), a precoding matrixindicator (PMI), a rank indicator (RI), and hybrid automatic repeatrequest (HARQ) acknowledgment (ACK) (HARQ-ACK) feedback (i.e., one ormore HARQ ACK bits indicating one or more ACK and/or negative ACK(NACK)). The PUSCH carries data, and may additionally be used to carry abuffer status report (BSR), a power headroom report (PHR), and/or UCI.

FIG. 3 is a block diagram of a base station 310 in communication with aUE 350 in an access network. In some examples, a repeater 113 mayamplify and/or forward communication between the base station 310 andthe UE 350. In some examples, the repeater 113 may amplify and forwardwireless communication between other devices, e.g., including IAB nodesor other repeaters in addition to the examples with UEs and basestations. In the DL, IP packets from the EPC 160 may be provided to acontroller/processor 375. The controller/processor 375 implements layer3 and layer 2 functionality. Layer 3 includes a radio resource control(RRC) layer, and layer 2 includes a service data adaptation protocol(SDAP) layer, a packet data convergence protocol (PDCP) layer, a radiolink control (RLC) layer, and a medium access control (MAC) layer. Thecontroller/processor 375 provides RRC layer functionality associatedwith broadcasting of system information (e.g., MIB, SIBs), RRCconnection control (e.g., RRC connection paging, RRC connectionestablishment, RRC connection modification, and RRC connection release),inter radio access technology (RAT) mobility, and measurementconfiguration for UE measurement reporting; PDCP layer functionalityassociated with header compression/decompression, security (ciphering,deciphering, integrity protection, integrity verification), and handoversupport functions; RLC layer functionality associated with the transferof upper layer packet data units (PDUs), error correction through ARQ,concatenation, segmentation, and reassembly of RLC service data units(SDUs), re-segmentation of RLC data PDUs, and reordering of RLC dataPDUs; and MAC layer functionality associated with mapping betweenlogical channels and transport channels, multiplexing of MAC SDUs ontotransport blocks (TBs), demultiplexing of MAC SDUs from TBs, schedulinginformation reporting, error correction through HARQ, priority handling,and logical channel prioritization.

The transmit (TX) processor 316 and the receive (RX) processor 370implement layer 1 functionality associated with various signalprocessing functions. Layer 1, which includes a physical (PHY) layer,may include error detection on the transport channels, forward errorcorrection (FEC) coding/decoding of the transport channels,interleaving, rate matching, mapping onto physical channels,modulation/demodulation of physical channels, and MIMO antennaprocessing. The TX processor 316 handles mapping to signalconstellations based on various modulation schemes (e.g., binaryphase-shift keying (BPSK), quadrature phase-shift keying (QPSK),M-phase-shift keying (M-PSK), M-quadrature amplitude modulation(M-QAM)). The coded and modulated symbols may then be split intoparallel streams. Each stream may then be mapped to an OFDM subcarrier,multiplexed with a reference signal (e.g., pilot) in the time and/orfrequency domain, and then combined together using an Inverse FastFourier Transform (IFFT) to produce a physical channel carrying a timedomain OFDM symbol stream. The OFDM stream is spatially precoded toproduce multiple spatial streams. Channel estimates from a channelestimator 374 may be used to determine the coding and modulation scheme,as well as for spatial processing. The channel estimate may be derivedfrom a reference signal and/or channel condition feedback transmitted bythe UE 350. Each spatial stream may then be provided to a differentantenna 320 via a separate transmitter 318Tx. Each transmitter 318Tx maymodulate a radio frequency (RF) carrier with a respective spatial streamfor transmission.

At the UE 350, each receiver 354Rx receives a signal through itsrespective antenna 352. Each receiver 354Rx recovers informationmodulated onto an RF carrier and provides the information to the receive(RX) processor 356. The TX processor 368 and the RX processor 356implement layer 1 functionality associated with various signalprocessing functions. The RX processor 356 may perform spatialprocessing on the information to recover any spatial streams destinedfor the UE 350. If multiple spatial streams are destined for the UE 350,they may be combined by the RX processor 356 into a single OFDM symbolstream. The RX processor 356 then converts the OFDM symbol stream fromthe time-domain to the frequency domain using a Fast Fourier Transform(FFT). The frequency domain signal comprises a separate OFDM symbolstream for each subcarrier of the OFDM signal. The symbols on eachsubcarrier, and the reference signal, are recovered and demodulated bydetermining the most likely signal constellation points transmitted bythe base station 310. These soft decisions may be based on channelestimates computed by the channel estimator 358. The soft decisions arethen decoded and deinterleaved to recover the data and control signalsthat were originally transmitted by the base station 310 on the physicalchannel. The data and control signals are then provided to thecontroller/processor 359, which implements layer 3 and layer 2functionality.

The controller/processor 359 can be associated with a memory 360 thatstores program codes and data. The memory 360 may be referred to as acomputer-readable medium. In the UL, the controller/processor 359provides demultiplexing between transport and logical channels, packetreassembly, deciphering, header decompression, and control signalprocessing to recover IP packets from the EPC 160. Thecontroller/processor 359 is also responsible for error detection usingan ACK and/or NACK protocol to support HARQ operations.

Similar to the functionality described in connection with the DLtransmission by the base station 310, the controller/processor 359provides RRC layer functionality associated with system information(e.g., MIB, SIBs) acquisition, RRC connections, and measurementreporting; PDCP layer functionality associated with headercompression/decompression, and security (ciphering, deciphering,integrity protection, integrity verification); RLC layer functionalityassociated with the transfer of upper layer PDUs, error correctionthrough ARQ, concatenation, segmentation, and reassembly of RLC SDUs,re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; andMAC layer functionality associated with mapping between logical channelsand transport channels, multiplexing of MAC SDUs onto TBs,demultiplexing of MAC SDUs from TBs, scheduling information reporting,error correction through HARQ, priority handling, and logical channelprioritization.

Channel estimates derived by a channel estimator 358 from a referencesignal or feedback transmitted by the base station 310 may be used bythe TX processor 368 to select the appropriate coding and modulationschemes, and to facilitate spatial processing. The spatial streamsgenerated by the TX processor 368 may be provided to different antenna352 via separate transmitters 354Tx. Each transmitter 354Tx may modulatean RF carrier with a respective spatial stream for transmission.

The UL transmission is processed at the base station 310 in a mannersimilar to that described in connection with the receiver function atthe UE 350. Each receiver 318Rx receives a signal through its respectiveantenna 320. Each receiver 318Rx recovers information modulated onto anRF carrier and provides the information to a RX processor 370.

The controller/processor 375 can be associated with a memory 376 thatstores program codes and data. The memory 376 may be referred to as acomputer-readable medium. In the UL, the controller/processor 375provides demultiplexing between transport and logical channels, packetreassembly, deciphering, header decompression, control signal processingto recover IP packets from the UE 350. IP packets from thecontroller/processor 375 may be provided to the EPC 160. Thecontroller/processor 375 is also responsible for error detection usingan ACK and/or NACK protocol to support HARQ operations.

As illustrated, the repeater 113 may be configured to perform aspects inconnection with the phase noise component 198 of FIG. 1 .

At least one of the TX processor 316, the RX processor 370, and thecontroller/processor 375 may be configured to perform aspects inconnection with the phase noise component 199 of FIG. 1 .

In certain situations, direct communication between a base station and aUE may be at least partially blocked by a blockage, such as shown at 117in FIG. 1 , or the UE may be out of range of the base station. Arepeater device may be configured to extend the coverage of the basestation by amplifying the signals transmitted between the base stationand the UE. In addition to forwarding signals between a base station anda UE, a repeater may forward signals between other devices, such as abase station, IAB node, UE, etc. A repeater is a relay node thatperforms an amplify and forward operation between two wireless nodes.The repeater may provide a simple and cost-effective way to improvenetwork coverage. The amplify and forward operation of the repeater maybe different than a relay node that decodes and forwards thecommunication, such as an IAB node. A relay node that decodescommunication before forwarding the signal may be referred to as adecode and forward relay node.

In some aspects, a repeater may be capable of some types of control, andmay receive information such as timing information (e.g., about a slot,symbol, subframe, frame boundary, etc.) about the communication beingforwarded, time division duplex (TDD) uplink/downlink configuration,ON-OFF scheduling for the repeater, and/or spatial information for beammanagement. A first type of repeater may be referred to as a traditionalrepeater and may amplify and forward the signal without any additionalinformation or control. The repeater may be in an always on state andmay receive and forward signals without a change in repeater parameters.A second type of repeater may be referred to as an autonomous smartrepeater that is capable of obtaining, acquiring, or inferringinformation to adjust repeater operation, e.g., without direct controlsignaling. As an example, the second type of repeater may obtaininformation based on receiving and decoding broadcast channels, and mayadjust one or more repeater parameter based on the obtained information.A third type of repeater may be referred to as a network controlledrepeater and may support some aspects of configuration or control basedon side information provided to the repeater by a base station. Therepeater may receive the information/control signaling/configuration viaan established control interface with the base station. In some aspects,the repeater may adjust operation based on side informationprovided/controlled by the base station without additional sideinformation inferred/obtained by the repeater. In other aspects, therepeater adjust operation based on side information provided/controlledby the base station and also based on remaining side informationinferred/obtained/acquired by the repeater itself. In some aspects, theuse of the combination of side information from the base station andadditional side information obtained/acquired/inferred by the repeatermay reduce control signaling overhead and/or latency for the adjustmentof parameters at the repeater.

FIG. 4A is a block diagram of an example communication system 400including a base station 410, a UE 430, and a repeater 420. The repeater420 may include a repeating unit 422 and a mobile termination component424 (“MT”). In some examples, the repeating unit 422 may be referred toas a remote unit. The base station 410 may correspond to the basestation 102, 180 in FIG. 1 or the base station 310 in FIG. 3 . The UE504 may correspond to the UE 104 in FIG. 1 or the UE 350 in FIG. 3 .

In FIG. 4A, the repeating unit 422 of the repeater 420 may be configuredto amplify and transmit downlink signals from the base station 410 tothe UE 430 using an access link 414. The repeating unit 422 may also beconfigured to amplify and transmit uplink signals from the UE 430 to thebase station 410 using the access link 414. Thus, the access link 414may be used as a path that carries uplink signals from the UE 430 and/ordownlink signals to the UE 430. In some examples, the access link 414may be controlled by the base station 410.

In some examples, the base station 410 may also establish a front-haullink 412 with the mobile termination component 424 of the repeater 420.The front-haul link 412 may be configured to carry UL/DL control signalsto configure the operation of the repeater 420. For example, thefront-haul link 412 may use a control interface of the base station 410to send messages to the repeater 420 to control the beamformingprocedures or computations for downlink/uplink transmissions such asusing different beams or beams directed to different directions totransmit to different UEs. Although FIG. 4A illustrates an example inwhich the control node is a base station, in other examples, the controlnode may be a different device, such as an IAB node. Additionally, thecontrol node may provide control signaling to the repeater for use inrepeating communication originating at a different device.

FIG. 4B is an example of a schematic diagram of the repeater 420including a repeating unit 422 and a mobile termination component 424.The repeater 420 may also include a receive array 428 (“RX”) and atransmit array 429 (“TX”). The receive array 428 may receive UL/DLsignals (e.g., over a control link with a control node and access linkswith one or more devices for which the repeater forwards communication)and the transmit array 429 may transmit UL/DL signals (e.g., over thecontrol link and access link(s)). The repeater 420 may include an analogamplifier 421 to amplify the UL/DL signals received at the receive array428 and pass the amplified signals to the transmit array 429 (e.g.,amplify and forward).

In FIG. 4B, the mobile termination component 424 includes a basebandprocessor 426 configured to receive control signaling from a controlnode (such as the base station 410) through the receive array 428. Forexample, the mobile termination component 424 may decode the controlsignaling to determine the control information provided by the basestation, whereas the repeating unit 422 amplifies and forwards the UL/DLsignal (e.g., to the UE 430) without decoding the UL/DL signal. Thecontrol signaling may include control parameters for the repeater 420 inforwarding communication (e.g., between the base station 410 and the UE430). The repeater 420 applies the control configuration to therepeating unit 422 component. For example, the repeating unit 422 mayapply one or more control parameters to the receive array 428 and/or thetransmit array 429 based on the control received by the mobiletermination component 424 from the control node. The repeating unit 422may receive and process a control signal from a control node similar tothe UE 350 described in connection with FIG. 3 .

FIG. 5 illustrates an example communication flow 500 between a firstwireless device and a second wireless device with an amplify and forwardrepeater device 506. The example in FIG. 5 illustrates an example for abase station 502 and a UE 504, but the aspects may be similarly appliedfor repetitions between a UE and UE, an IAB node and UE, an RSU and UE.Similarly, the aspects performed by the base station 502 may beperformed by a UE, an IAB node, an RSU, or another wireless device.Although aspects are described in connection with repetition between abase station and a UE, the aspects may be applied for repetition betweentwo other wireless devices, such as between any of a base station, IABnode, UE, another repeater, etc.

In some examples, the repeater device 506 may be controlled by a controlnode, such as the base station 502. In other examples, the control nodemay be separate from the base station or from the device transmitting asignal to be repeated by the repeater device 506. The configuration ofthe repeater device 506 can be adjusted or reconfigured (statically ordynamically) depending on the conditions (e.g., internal conditions,external conditions, and/or environmental conditions) of thecommunication system including the base station 502, the UE 504, and therepeater device 506. For example, the base station 502 may transmitcontrol signaling 514 to reconfigure the beamforming procedures of therepeater device 506 based on a change in conditions.

The control signaling 514 may indicating beamforming information for therepeater device 506, e.g., such as a reception beam for receivingcommunication from the base station 502 and/or one or more transmissionbeams for forwarding communication to the UE 504. The control signaling514 may indicate a transmission power for the repeater to use in uplinkand/or downlink forwarding. The control signaling 514 may indicate anoperating bandwidth. In some examples, the operating bandwidth mayinclude frequency processing and filtering. The control signaling 514may indicate a time domain resource allocation for the repeater device506. The time domain resource allocation may include an UL/DL patternthat indicates when the repeater device 506 is configured to use UL andDL resources. For example, a time domain resource allocation mayindicate time resources for the repeater device 506 to apply theindicated beamforming configuration. In some examples, the repeaterdevice 506 may be configured with more than one beam to be applied atdifferent times, e.g., a set of beams to apply in a pattern. The controlsignaling 514 may include ON-OFF scheduling that turns the repeater, orthe repeater operation, on and off at particular times or for particulardurations. The control signaling 514 may indicate timing information,such as a slot, symbol, subframe, or frame boundary, for downlink anduplink transmissions with the base station. In some aspects, therepeater may transmit an indication of support for (e.g., a capability)receiving control signaling or additional information from the basestation 502, at 512. The base station 502 may send the control signalingbased on the capability of the repeater device 506.

The control signaling may be transmitted or received on a controlinterface established with the base station 502 and an MT 508 (or othercomponent capable of receiving control) of the repeater device 506.

The amplify and forward operation may be performed by a repeating unit509 of the repeater device 506. As illustrated, the base station 502 maytransmit a UE downlink signal 522 to the repeater device 506 forforwarding to the UE 504. At 523, the repeater device 506 may amplifythe downlink signal 522 from the base station 502, and/or may shift thefrequency of the downlink signal from FR2 to FR1. The numerology (e.g.,of the downlink signal 522 in FR2 and the downlink signal 524 afterbeing shifted to FR1) may be based on an FR1 numerology. The repeatermay apply the control information received at 514 in receiving thedownlink signal and/or in forwarding the downlink signal to the UE 504at 524. The UE 504 may transmit a UE uplink signal 526 to the repeaterdevice 506 for forwarding to the base station 502. At 527, the repeaterdevice 506 may amplify the uplink signal 526 from the base station 502,and/or may shift the frequency of the uplink signal from FR1 to FR2. Thenumerology (e.g., of the uplink signal 526 in FR1 and the uplink signal528 after being shifted to FR2) may be based on an FR1 numerology. Therepeater may apply the control information received at 514 in receivingthe uplink signal and/or in forwarding the UE uplink signal 528 to thebase station 502.

A link between the base station 502 and the repeater device 506 may bereferred to as a fronthaul link, and a link between the repeater device506 and the UE 504 may be referred to as an access link. As illustratedin FIG. 5 , the repeater device 506 may be an out-of-band repeater thatoperates in different frequency ranges over a fronthaul link with a basestation and an access link with a UE. For example, the repeater device506 may transmit and receive signals on the fronthaul link with the basestation in FR2, and may transmit and receive signals on the access linkwith the UE in FR1. In some aspects, the repeater may shift thefrequency of the signal that it forwards, or repeats, between the basestation 502 and the UE 504. For example, when repeating/forwarding anuplink transmission from the UE 504 to the base station 502, therepeater device 506 may shift the center frequency of the uplink signalfrom FR1 to FR2 before forwarding the signal to the base station. Therepeater may shift the frequency without changing the numerology of theforwarded signal. The downlink signals for the UE and the uplink signalsfrom the UE may be based on FR1 numerologies (e.g., a 15 kHZ or 30 kHzSCS). The waveform communicated between the repeater device 506 and thebase station in FR2 may be based on an FR1 numerology.

In some aspects, phase noise may be introduced in signals based onhigher frequency (e.g., FR2) components such as local oscillators. Thenoise incurred in the oscillators may result in phase modulation of theinformation signal, and may lead to changes in the frequency spectrumand timing properties of the information signal. The noise related tothe oscillators may be referred to as phase noise. Phase noise producedin local oscillators may introduce a significant degradation in somefrequencies, such as at mmW frequencies, e.g., depending on the powerspectral density of phase noise. Phase noise leads to a common phaseerror (CPE) and/or inter-carrier interference (ICI). CPE may lead to anidentical, or similar, rotation of a received symbol in each subcarrier.ICI may lead to a loss of orthogonality between the subcarriers.

The repeater device 506 and the base station 502 may experience phasenoise in the FR2 signals. The phase noise may affect the UE's signal,which has a smaller SCS and longer symbol duration. The UE 504 may nothave a way to compensate for the added phase noise that is introducedbased on the signal between the base station 502 and the repeater device506. As an example, the UE signals may not include a phase trackingreference signal (PTRS) as the signals 524 and 526 may be in a frequencyrange (e.g., FR1), that does not include signaling framework for a PTRS.

Aspects presented herein provide techniques for addressing or correctingphase noise in the UE's signal (uplink or downlink), e.g., due to theFR2 signal between the repeater device 506 and the base station 502.

In some aspects, a base station may determine a level of the phase noiseon the UE's sub-6 signal and may adjust a repeater configuration or stopusing a repeater in response phase noise level. FIG. 6 illustrates anexample communication flow 600 between a first wireless device and asecond wireless device with an amplify and forward repeater 606. Theexample in FIG. 6 illustrates an example for a base station 602 and a UE604, but the aspects may be similarly applied for repetitions between aUE and UE, an IAB node and UE, an RSU and UE. Similarly, the aspectsperformed by the base station 602 may be performed by a UE, an IAB node,an RSU, or another wireless device. FIG. 6 illustrates an examplecommunication flow 600 between a base station 602, a repeater 606 (thatmay include an MT 611 and repeating unit 609), and a UE 604. The aspectsof FIG. 6 may be employed in connection with the aspects described inconnection with FIG. 5 . The repeater 606 may be referred to as afrequency shifting repeater, as the repeater 606 may shift the frequencyof the UE signals between FR1 and FR2, as described in connection withFIG. 5 . The base station 602 may determine the severity level of thephase noise on the UE's sub-6 signal, at 613, and accordingly may adjustthe configuration/operation of the repeater 606.

If the base station 602 determines that the phase noise level is below athreshold, the base station 602 may continue to use the frequencyshifting repeater 606, and may continue to use an FR2-FR1 frequencyshifting configuration for the forwarding operation of the repeater 606.

If the base station determines, e.g., at 613, that the phase noise meetsor exceeds the threshold, the base station 602 may, in first aspects ora first option 650, change a configuration of the repeater 606. Forexample, the repeater 606 may support a configuration to perform FR2-FR1frequency shifting, e.g., as described in connection with FIG. 5 and maysupport an amplify and forward operation without frequency shifting. Theoperation without frequency shifting may be referred to as FR1-FR1operation, and the amplify ad forward operation with frequency shiftingmay be referred to as FR2-FR1 operation. In some aspects, the repeater606 may signal support, at 612, for one or more types of operation, andmay indicate to the base station 602 that the repeater 606 supportsFR2-FR1 operation, FR1-FR1 operation, and/or that the repeater supportsa configuration change between FR2-FR1 and FR1-FR1 operation. Inresponse to the phase noise, as determined at 612, the base station 602may indicate to the repeater 606, at 614, to adopt a differentconfiguration (such as a FR1-FR1 operation/configuration in which therepeater receives and forwards signals in the same FR and withoutperforming a frequency shift). For example, the repeater 606 maycorrespond to the repeater device 506 in FIG. 5 , and may have beenapplying a frequency shift at 523 and 527. As illustrated in FIG. 6 ,the repeater 606 may change to amplify the downlink signal 622 without afrequency shift, at 623, before repeating the downlink signal 624 to theUE 604. Similarly, the repeater 606 may amplify and forward the uplinksignal 626, at 627, from the UE 604 to the base station 602 at 628,e.g., without a frequency shift to FR2.

In other aspects, if the base station determines, e.g., at 613, that thephase noise meets or exceeds the threshold, the base station 602 maydecide to stop using the repeater 606 to communicate with the UE 604. Asa second option or aspect 655, the base station may switch to adifferent repeater 608. The base station 602 may transmit downlinksignals 632 to the new repeater 608 for forwarding to the UE 604 at 634.The UE 604 may transmit uplink signals 636 to the new repeater 608 forforwarding to the base station 602, as uplink signal 638. The repeater608 may perform an amplify and forward operation with frequency shiftingor without frequency shifting, e.g., based on a capability of therepeater 608, and/or a configuration provided to the repeater 608 by thebase station 602. In other a third option or aspect 660, the basestation 602 may stop using the repeater 606 and may exchangecommunication directly with the UE 604, as shown at 640.

The base station may determine the level of the phase noise, e.g., at613, in any of various ways. FIG. 7 illustrates an example communicationflow 700 between a first wireless device and a second wireless devicewith an amplify and forward repeater 706. The example in FIG. 7illustrates an example for a base station 702 and a UE 704, but theaspects may be similarly applied for repetitions between a UE and UE, anIAB node and UE, an RSU and UE. Similarly, the aspects performed by thebase station 702 may be performed by a UE, an IAB node, an RSU, oranother wireless device. FIG. 7 illustrates an example communicationflow 700 between a base station 702, a repeater 706, and a UE 704,including various ways for a base station 702 to determine a phase noiselevel. The repeater 706 may amplify and frequency shift, at 723, thedownlink signal 722 before transmission to the UE 704 at 724. Therepeater 706 may amplify and frequency shift, at 727, the uplink signal(e.g., the uplink transmission 726) before forwarding to the basestation at 728. FIG. 5 illustrates example aspects of the frequencyshift. The aspects of FIG. 7 may be performed in combination with any ofthe aspects of FIG. 6 and/or FIG. 5 . In some aspects, the base station702 may use an uplink signal sent by the UE 704 (in FR1) as forwarded bythe repeater 706 on FR2 after frequency shifting, at 727. The basestation 602 may measure, at 730, the phase distortion of the receivedsignal (e.g., 728). The base station 702 may measure a constant phaseoffset and a change in the phase offset over time. As an example, theuplink signal 728 may be scheduled or configured by the base station702. For example, the base station 702 may have sent a downlink controlsignal to the UE 704 at 722 that scheduled the uplink signaltransmission (e.g., uplink transmission 726) and/or configured one ormore parameter of the uplink transmission 726. The downlink controlsignaling may pass through the same repeater 706 and be sent over FR2 onthe fronthaul and down-converted to FR1 by the repeater 706 beforetransmission to the UE at 724. The transmission of downlink controlsignaling to the UE 704 may work, e.g., if the phase noise level issufficiently low to allow the UE 704 to successfully receive and applythe downlink control signaling (e.g., with low MCS). In some aspects,the phase noise measurement, e.g., at 730, may be performed during aninitial access procedure. For example, the base station may measure aphase noise in a random access channel (RACH) Msg1 or a Msg3 of a randomaccess procedure. As an example,

In some aspects, the source of phase noise may not be the FR1transmission from the UE, but may be due to the FR2 components at thebase station 702 and the repeater 706. The base station may learn thephase noise level over time, e.g., based on uplink signals from multipleUEs via the repeater, e.g., signal(s) 732 forwarded by the repeater forother UEs that are not illustrated. For example, as the phase noise isintroduced in the signal between the repeater and the base station, eachuplink signal may include similar phase noise levels even through thesignals are with different UEs. The base station 702 may use themeasurement of the phase noise in the UE's uplink signal to determinewhether a phase noise threshold has been exceeded, e.g., at 613, in FIG.6 , which may trigger any of the adjustments described in connectionwith FIG. 6 .

In other aspects, the phase noise may be measured based on basestation-repeater communication. As an example, the base station 702 maycan transmit a downlink signal 736 in FR2 to the repeater 706, and mayrequest the repeater 706 to report a phase noise measurement based onthe downlink signal. The request may be included in the downlink signal736 or may be transmitted in a separate message, e.g., to the MT of therepeater 706. The repeater may perform one or more measurementsassociated with phase noise, in response to the request. For example,the repeater 706 may estimate a common phase error (CPE) and/or avariation of CPE over time based on the downlink signal from the basestation 702. The repeater 706 may report the measured phase noise, orCPE, to the base station 702, at 738. The base station 702 may use thereport from the repeater to determine whether a phase noise thresholdhas been exceeded, e.g., at 613, in FIG. 6 , which may trigger any ofthe adjustments described in connection with FIG. 6 .

In some aspects, the base station 702 may indicate the threshold to therepeater, e.g., in the request (e.g., in downlink signal 736) or inother control signaling. The repeater 706 may measure the phase noise inthe downlink signal, at 730, and may transmit the report for themeasurement in response to a measurement that exceeds the thresholdindicated by the base station. The use of the threshold by the repeatermay reduce the amount of signaling between the repeater and the basestation, e.g., with reports of a phase noise that does not exceed thethreshold, and may enable the repeater to send targeted reports when aphase noise is to be addressed by the base station.

As another example, the base station 702 may can transmit a request 740to the repeater 706 to transmit an uplink signal 742 for measurement ofphase noise. The base station 702 may measure, at 744, the uplink signal742 from the repeater (e.g., in contrast to the UE uplink signalforwarded by the repeater at 728) to measure the phase noise. The basestation 702 may use the measurement of the phase noise in the repeatersuplink signal 742 to determine whether a phase noise threshold has beenexceeded, e.g., at 613, in FIG. 6 , which may trigger any of theadjustments described in connection with FIG. 6 .

In some aspects, the repeater may apply phase noise compensation whenamplifying and forwarding the signal. FIG. 8 illustrates an examplecommunication flow 800 between a first wireless device and a secondwireless device with an amplify and forward repeater 806. The example inFIG. 8 illustrates an example for a base station 802 and a UE 804, butthe aspects may be similarly applied for repetitions between a UE andUE, an IAB node and UE, an RSU and UE. Similarly, the aspects performedby the base station 802 may be performed by a UE, an IAB node, an RSU,or another wireless device. FIG. 8 illustrates an example communicationflow 800 between a base station 802, a repeater 806, and a UE 804,including various ways for compensation for or correction of phase noiseat the repeater 806. The repeater 806 may amplify and frequency shift,at 840, the downlink signal 822 before transmission to the UE 804 at824. The repeater 806 may amplify and frequency shift, at 827, theuplink signal 826 before forwarding to the base station at 828. FIG. 5illustrates example aspects of the frequency shift. The aspects of FIG.8 may be performed in combination with any of the aspects of FIG. 6and/or FIG. 5 . The repeater 806 may support phase noise estimation,e.g., at 830, and at least partial compensation or correction of phasenoise, e.g., at 838. In some aspects, the repeater may support digitalprocessing of the UE's downlink and uplink signals. In some aspects, therepeater may be referred to as a digital repeater.

On the downlink, the repeater receives the signal 822 from the basestation 802 intended for the UE 804. The repeater 806 digitizes thesignal, at 832, and stores the digitized signal in a local buffer, at836. The repeater 806 adjusts the signal 822, at 838, to compensate foran estimated phase noise, e.g., measured at 830, before forwarding theUE's signal to the UE 804, at 824. For example, the repeater 806 mayforward the UE's downlink signal 824 in a slot after the phase noiseestimation and compensation. In some aspects, the slot may be a firstslot after the phase noise estimation. In some aspects, the slot may be2 or more slots after the phase noise estimation and compensation. Tocompensate for the phase noise (e.g., compensation), at 838, therepeater 806 at least partially removes the CPE across the symbols ofthe UE signal. The repeater 806 may subtract or remove the estimatedphase noise from the signal.

The repeater 806 may acquire an estimation of the phase noise (PN) inany of various ways. In some aspects, the repeater 806 may measure CPEon the UE's signal, e.g., based on the downlink signal 822 for the UE804. In some aspects, the repeater may use the UE's downlink signal,e.g., using a reference signal or pilot signal such as downlink DMRS,sent along with the UE's data or control channel to estimate CPE, at830. In some aspects, the repeater 806 may use a cyclic prefix (CP) ofthe downlink symbols of the UE's downlink signal 822 to measure thephase noise or CPE, at 830.

In some aspects, the base station 802 may send an additional referencesignal to the repeater 806 to facilitate the phase noise estimate, at830. As an example, the additional reference signal may include a PTRS,or an additional DMRS, for the repeater. In some aspects, the basestation 802 may transmit the reference signal separately, e.g., at 821,from the downlink signal 822 for the UE. In other aspects, theadditional reference signal for the phase noise estimation at therepeater may be multiplexed with the downlink signal 822 for the UE.

For example, the additional reference signal may be time divisionmultiplexed (TDMed) with UE's signal 822. In some aspects, theadditional reference signal may be included at the beginning and/or endof the UE's signal 822. FIG. 9A illustrates an example 900 in which theadditional reference signal (e.g., 902 and 904) is included at thebeginning and end of the time resources of the UE's downlink signal 922(e.g., 822). In some aspects, the additional reference signal(s) 902 maybe interleaved in time with the UE's downlink signal 822. FIG. 9Billustrates an example 925 in which the additional reference signal isinterleaved in the time resources of the UE's downlink signal 922 (e.g.,822).

Additionally, or alternatively, the additional reference signal(s) maybe frequency division multiplied (FDMed) with UE's signal 922 (e.g.,822) and sent on separate RBs not occupied by the UE's downlink signal922. FIG. 9C illustrates an example 950 in which the additionalreference signal (902, 904, and/or 906) is included at additionalfrequency resources than the frequency resources of the UE's downlinksignal 922 (e.g., 822). The reference signal may overlap, at leastpartially, in time with the UE's downlink signal 922, e.g., as shown forthe reference signal 906. The reference signal may be in time resourcesbefore and after the downlink signal 922, e.g., as shown for 902 and904. The frequency resources may be adjacent to, or contiguous with theUE's downlink signal, as shown for 902 and 906, or may be non-contiguouswith the UE's downlink signal, as shown for 904. In some aspects, theadditional reference signal(s) may be interleaved in frequency with theUE's downlink signal 822. FIG. 9D illustrates an example 975 in whichthe additional reference signal 902 is interleaved in frequency with theresources of the UE's downlink signal 922 (e.g., 822).

In some aspects, the repeater 806 may extract the additional referencesignal, at 834, and may not forward the additional reference signals tothe UE 804 in the downlink signal 824. The repeater extracts, processesthese signals, and may not forward them to the UE. FIG. 10A illustratesan example time diagram 1000 illustrating a UE's downlink signal 1022(e.g., 822) that is transmitted by a base station to a repeater forforwarding to a UE, and which includes additional reference signals 1002and 1004 for phase estimation at the repeater. FIG. 10A also shows theUE's downlink signal 1024 (e.g., 824) transmitted by the repeater to theUE without the additional reference signal.

The inclusion of the additional reference signal may enable the repeaterto compensate for the phase noise of an individual transmission, e.g.,whereas the example in FIG. 6 may be based on longer measurements, e.g.,average phase noise measurements or estimates over time or change inphase noise measurements over time.

In some aspects, the repeater 806 may transmit an additional referencesignal to the base station 802 to enable the base station to measurephase noise in the UE's uplink transmission 828. The repeater 806 mayinsert the reference signal, at 842. The additional reference signal maybe in a separate transmission, as shown at 829, or may be multiplexedwith the uplink transmission 828. The additional reference signal may beTDMed and/or FDMed with the uplink transmission 828, e.g., asillustrated for the downlink example in FIGS. 9A-9D. FIG. 10Billustrates an example time diagram 1050 illustrating a UE's uplinksignal 1026 (e.g., 826) that is transmitted by a UE to a repeater forforwarding to a base station, and the inclusion by the repeater ofadditional reference signals 1002 and 1004, for phase estimation at thebase station, with the UE's uplink signal 1028 transmitted by therepeater to the base station.

FIG. 11A is a flowchart 1100 of a method of wireless communication. Themethod may be performed by a first wireless device (e.g., the apparatus1202). In some aspects, the method may be performed by a base station(e.g., the base station 102/180, 310, 410, 502, 602, 702, 802). In someaspects, the method may be performed by a UE (e.g., the UE 104, 350). Insome aspects, the method may be performed by another wireless device,such as an IAB node 111, an RSU 107, etc. The method may enableadjustment for phase noise in signaling between wireless device and anout-of-band repeater.

At 1102, the first wireless device transmits one or more transmissionsfor a second wireless device to a repeater for repetition to the secondwireless device. In some aspects, the first wireless device may be abase station, and the second wireless device may be a UE. In someaspects, the first wireless device may be a UE and the second wirelessdevice may be a base station. In some aspects, the first wireless devicemay be a UE and the second wireless device may be a UE. For example,FIG. 5-8 illustrate examples of a base station (as a non-limitingexample of a first wireless device) transmitting a downlink signal for asecond wireless device to a repeater. A UE may similarly transmit anuplink signal to the repeater for repetition to a base station. Thetransmission may be performed, e.g., by the transmission component 1234of the apparatus 1202 in FIG. 12 .

At 1104, the first wireless device adjusts a repeater operation based ona phase noise in transmission between the first wireless device and therepeater. The adjustment may be performed, e.g., by the repeater controlcomponent 1244 of the apparatus 1202 in FIG. 12 . FIG. 6 illustratesvarious aspects and options that the base station may apply to adjust arepeater operation based on a phase noise. For example, the firstwireless device may stop communication to the second wireless device viathe repeater or transmitting the communication to the second wirelessdevice via a different repeater. As another example, the first wirelessdevice may configure the repeater with a frequency shiftingconfiguration. FIG. 7 illustrates various ways that the first wirelessdevice may measure or obtain the phase noise.

At 1106, the first wireless device communicates with at least one of therepeater or the second wireless device based on the adjusted repeateroperation. The communication may include the transmission of signals tothe repeater for repetition to the second wireless device based on achange in a frequency shifting configuration as the adjusted repeateroperation. The communication may include a direct transmission to thesecond wireless device without repetition. The communication may beperformed, e.g., by the transmission component, e.g., by thetransmission component 1234 and/or the reception component 1230.

FIG. 11B illustrates an example flowchart of a method 1150 of wirelesscommunication that may include 1102, 1104, and 1106 of FIG. 11A. Themethod may be performed by a first wireless device (e.g., the apparatus1202). In some aspects, the method may be performed by a base station(e.g., the base station 102/180, 310, 410, 502, 602, 702, 802). In someaspects, the method may be performed by a UE (e.g., the UE 104, 350). Insome aspects, the method may be performed by another wireless device,such as an IAB node 111, an RSU 107, etc.

As illustrated at 1101, the first wireless device may receive from therepeater, an indication that the repeater supports the frequencyshifting configuration prior to the first wireless device configuringthe repeater. The reception may be performed, e.g., by the repeatercapability component 1248 of the apparatus 1202 in FIG. 12 . The firstwireless device may change a configuration of the repeater based on thereceipt of the indication that the repeater supports the configurationchange.

As illustrated at 1103, the first wireless device may receive, from therepeater, a repeated signal transmission from the second wirelessdevice. For example, FIG. 5-8 illustrate examples of a base station(e.g., as a non-limiting example of a first wireless device) receivingan uplink signal from a UE (e.g., as a non-limiting example of a secondwireless device) via a repeater. The reception may be performed, e.g.,by the reception component 1230 of the apparatus 1202.

As illustrated at 1110, the first wireless device may measure the phasenoise in the transmission between the first wireless device and therepeater, where the first wireless device adjusts the repeater operationbased on a measured phase noise being higher than a threshold. FIG. 7illustrates various ways that the base station may measure or obtain thephase noise. As an example, the first wireless device may measure achange in a phase offset over time in the transmissions from the secondwireless device. As an example, the first wireless device may receivemultiple signals from the second wireless device that are repeated bythe repeater and may measure the phase noise by measuring a change inphase offset over time in the multiple signals from the at least onesecond wireless device. The first wireless device may measure the changein the phase offset over the time for communication (e.g., multiplesignals) from multiple other wireless devices (e.g., multiple UEs, insome aspects) communicating with the first wireless device.

As illustrated at 1126, the first wireless device may receive anindication of the phase noise from the repeater, wherein the firstwireless device adjusts the repeater operation based on a measured phasenoise being higher than a threshold. The reception may be performed,e.g., by the phase noise component 1250 of the apparatus 1202. In someaspects, the first wireless device may transmit a request for therepeater to report the phase noise, the indication being received inresponse to the request, at 1112. The request may be transmitted by therequest component 1246 of the apparatus 1202 in FIG. 12 . The requestmay indicate for the repeater to report the phase noise if the phasenoise exceeds a phase noise threshold. In some aspects, the firstwireless device may transmit an additional signal to the repeater, at1124, with the one or more transmission for the repetition to the secondwireless device, the additional signal including at least one of a DMRS,a PTRS, or an additional reference signal for the repeater. Theadditional signal may be multiplexed in at least one of time resourcesor frequency resources with a signal for the second wireless device. Themultiplexing may include any of the aspects described in connection withFIG. 9A-D or 10A.

As illustrated, at 1108, the first wireless device may receive areference signal (e.g., an additional reference signal) from therepeater, the reference signal multiplexed in the repetition of a signalfrom the first wireless device, wherein the phase noise is based thereference signal. The additional reference signal may include any of theaspects described in connection with FIGS. 8-10B. The reception may beperformed by the reception component 1230, and measurement of the phasenoise based on the reference signal may be performed, e.g., by the phasenoise component 1250 of the apparatus 1202.

FIG. 12 is a diagram 1200 illustrating an example of a hardwareimplementation for an apparatus 1202. The apparatus 1202 may be a basestation, a component of a base station, or may implement base stationfunctionality. The apparatus may be a UE, a component of a UE, or mayimplement UE functionality. The apparatus may be another wirelessdevice, such as an IAB node, and RSU, etc. In some aspects, theapparatus 1202 may include a baseband unit 1204. The baseband unit 1204may communicate through a cellular RF transceiver 1222 with the UE 104.The baseband unit 1204 may include a computer-readable medium/memory.The baseband unit 1204 is responsible for general processing, includingthe execution of software stored on the computer-readable medium/memory.The software, when executed by the baseband unit 1204, causes thebaseband unit 1204 to perform the various functions described supra. Thecomputer-readable medium/memory may also be used for storing data thatis manipulated by the baseband unit 1204 when executing software. Thebaseband unit 1204 further includes a reception component 1230, acommunication manager 1232, and a transmission component 1234. Thecommunication manager 1232 includes the one or more illustratedcomponents. The components within the communication manager 1232 may bestored in the computer-readable medium/memory and/or configured ashardware within the baseband unit 1204. The baseband unit 1204 may be acomponent of a wireless device, (such as a base station 310 or UE 350)and may include the memory 376 and/or at least one of the TX processor316, the RX processor 370, and the controller/processor 375.

The communication manager 1232 includes a transmission component 1234that transmits transmission(s) for a second wireless device to arepeater, e.g., as described in connection with 1102 in FIG. 11A or 11B.The communication manager 1232 further includes a reception component1230 that receives, from the repeater, an uplink repetition of one ormore uplink transmissions from the second wireless device, e.g., asdescribed in connection with 1104 in FIG. 11A or 11B. The communicationmanager 1232 further includes a repeater control component 1244 thatadjusts a repeater operation based on a phase noise in transmissionbetween the first wireless device and the repeater, e.g., as describedin connection with 1106 in FIG. 11A or 11B. The communication manager1232 further includes a request component 1246 that transmits a requestfor the repeater to report a phase noise, e.g., as described inconnection with 1122 in FIG. 11B. The communication manager 1232 furtherincludes a repeater capability component 1248 that receives, from therepeater, an indication that the repeater supports the frequencyshifting configuration prior to configuring the repeater, e.g., asdescribed in connection with 1101 in FIG. 11B. The communication manager1232 further includes a phase noise component 1250 that measures thephase noise in the transmission between the first wireless device andthe repeater or receives an indication of the phase noise from therepeater, e.g., as described in connection with 1108, 1110 or 1126 inFIG. 11B.

The apparatus may include additional components that perform each of theblocks of the algorithm in the flowchart of FIG. 11A or 11B, and/or anyof the aspects performed by the base station (as a non-limiting exampleof a first wireless device) in FIG. 4A, 5, 6, 7 , or 8. As such, eachblock in the flowchart of FIG. 11A or 11B, and/or any of the aspectsperformed by the base station (as a non-limiting example of a firstwireless device) in FIG. 4A, 5, 6, 7 , or 8 may be performed by acomponent and the apparatus may include one or more of those components.The components may be one or more hardware components specificallyconfigured to carry out the stated processes/algorithm, implemented by aprocessor configured to perform the stated processes/algorithm, storedwithin a computer-readable medium for implementation by a processor, orsome combination thereof.

As shown, the apparatus 1202 may include a variety of componentsconfigured for various functions. In one configuration, the apparatus1202, and in particular the baseband unit 1204, includes means fortransmitting one or more transmissions for a second wireless device to arepeater for repetition to the second wireless device; means forreceiving, from the repeater, an uplink repetition of one or more uplinktransmissions from the second wireless device; and means for adjusting arepeater operation based on a phase noise in transmission between thefirst wireless device and the repeater. The apparatus 1202 may furtherinclude means for measuring the phase noise in the transmission betweenthe first wireless device and the repeater, wherein the first wirelessdevice adjusts the repeater operation based on a measured phase noisebeing higher than a threshold. The apparatus 1202 may further includemeans for receiving an indication of the phase noise from the repeater,wherein the first wireless device adjusts the repeater operation basedon a measured phase noise being higher than a threshold. The apparatus1202 may further include means for transmitting a request for therepeater to report the phase noise, the indication being received inresponse to the request. The apparatus 1202 may further include meansfor transmitting an additional signal to the repeater with the one ormore transmission for the repetition to the second wireless device, theadditional signal including at least one of a demodulation referencesignal (DMRS), a phase tracking reference signal (PTRS), or anadditional reference signal for the repeater. The apparatus 1202 mayfurther include means for receiving reference signal from the repeater,the reference signal multiplexed in the repetition of the one or moreuplink transmission, wherein the phase noise is based the referencesignal. The means may be one or more of the components of the apparatus1202 configured to perform the functions recited by the means. Asdescribed supra, the apparatus 1202 may include the TX processor 316,the RX processor 370, and the controller/processor 375. As such, in oneconfiguration, the means may be the TX processor 316, the RX processor370, and the controller/processor 375 configured to perform thefunctions recited by the means.

FIG. 13A is a flowchart 1300 of a method of wireless communication. Themethod may be performed by a repeater (e.g., 113, 420, 506, 606, 706,806; the apparatus 1502. The method may enable adjustment for phasenoise in signaling between a first wireless device and an out-of-bandrepeater.

At 1302, the repeater receives from a first wireless device, a requestfor the repeater to report a phase noise in transmissions between thefirst wireless device and the repeater for repetition with at least onesecond wireless device. In some aspects, the first wireless device maybe a base station, and the second wireless device may be a UE. In someaspects, the first wireless device may be a UE and the second wirelessdevice may be a base station. In some aspects, the first wireless devicemay be a UE and the second wireless device may be a UE. The request mayindicate for the repeater to report the phase noise if the phase noiseexceeds a phase noise threshold, the report being transmitted based onthe phase noise exceeding the phase noise threshold. FIG. 7 illustratesan example of a repeater receiving a request from a first wirelessdevice. The request may be received, e.g., by the request component 1546of the apparatus 1502 in FIG. 15 .

At 1306, the repeater transmits a report of the phase noise to the firstwireless device based on the request. FIG. 7 illustrates an example of arepeater transmitting a report of the phase noise to the first wirelessdevice. The transmission may be performed, e.g., by the phase noisecomponent 1550 of the apparatus 1502 in FIG. 15 .

FIG. 13B illustrates a method 1350 of wireless communication that mayinclude 1302 and 1306 from FIG. 13A. As illustrated at 1308, therepeater may receive a frequency shifting configuration from the firstwireless device. FIG. 6 illustrates an example of a repeater receiving achange of a configuration for frequency shifting, e.g., at 650. In someaspects, the first wireless device may be a base station, and the secondwireless device may be a UE. In some aspects, the first wireless devicemay be a UE and the second wireless device may be a base station. Insome aspects, the first wireless device may be a UE and the secondwireless device may be a UE.

At 1310, the repeater may receive one or more transmissions from asecond wireless device, and at 1312, when transmitting the repetition ofthe one or more uplink transmissions to the first wireless device with afrequency shift based on the frequency shifting configuration. Theuplink transmissions may be received and transmitted by the transmissioncomponent 1534 the apparatus 1502.

In some aspects, the repeater may transmit, to the first wirelessdevice, an indication that the repeater supports the frequency shiftingconfiguration prior to receiving the frequency shifting configuration,at 1301. FIG. 6 illustrates an example of a UE (e.g., as a non-limitingexample of a second wireless device) providing the indication to thefirst wireless device. The transmission may be performed, e.g., by therepeater capability component 1548 of the apparatus 1502.

In some aspects, at 1304, the repeater may measure the phase noise basedon the signal for the second wireless device. In some aspects, at 1304,the repeater may measure the phase noise based on an additional signalto the repeater with one or more transmissions for repetition to thesecond wireless device. The additional signal may include at least oneof a DMRS for the repeater, a PTRS, or an additional reference signalfor the repeater. The additional signals may be multiplexed in at leastone of time resources or frequency resources with a signal for thesecond wireless device. FIGS. 9A-9D and 10A illustrate various aspectsof an additional signal that the repeater may receive to measure phasenoise.

In some aspects, the repetition of the one or more transmissions fromthe second wireless device that is transmitted at 1312, may include anadditional signal from the repeater. The additional signal may includeat least one of a DMRS for the first wireless device, a PTRS, or anadditional reference signal for the first wireless device, theadditional signal being multiplexed in at least one of time resources orfrequency resources with a signal from the second wireless device. FIGS.10A and 10B illustrate various aspects of transmitting an additionalsignal to a first wireless device. The transmission may be performed,e.g., by the transmission component 1534 of the apparatus 1502.

FIG. 14A is a flowchart 1400 of a method of wireless communication. Themethod may be performed by a repeater (e.g., 113, 420, 506, 606, 706,806; the apparatus 1502. The method may enable adjustment for phasenoise in signaling between a wireless device and an out-of-bandrepeater.

At 1402, the repeater receives, from a first wireless device, atransmission for repetition with at least one second wireless device. Insome aspects, the first wireless device may be a base station, and thesecond wireless device may be a UE. In some aspects, the first wirelessdevice may be a UE and the second wireless device may be a base station.In some aspects, the first wireless device may be a UE and the secondwireless device may be a UE. FIGS. 4A-10A illustrates various aspects ofa repeater receiving transmissions for a UE (e.g., as a non-limitingexample of a second wireless device). The reception may be performed,e.g., by the reception component 1530 of the apparatus 1502 in FIG. 15 .

At 1404, the repeater transmits the repetition of the transmission tothe at least one second wireless device with a phase noise compensation.FIG. 8 illustrates various aspects of phase noise measurement andcompensation that may be applied by the UE. The transmission may beperformed, e.g., by the transmission component 1534 of the apparatus1502 in FIG. 15 with compensation applied by the compensation component1544.

FIG. 14B illustrates an example flowchart of a method 1450 of wirelesscommunication that may include 1402 and 1412 of FIG. 14A. As illustratedat 1410, the repeater may further adjust the repetition of thetransmission, at the repeater to remove a CPE across symbols of thetransmission before transmitting the repetition to the second wirelessdevice. FIG. 8 illustrates various aspects of a repeater compensatingfor phase noise. The compensation may be performed, e.g., by thecompensation component 1544 of the apparatus 1502.

As illustrated at 1404, the repeater may perform a phase noisemeasurement based on the transmission for the second wireless device.The phase noise measurement may be based on at least one of a DMRS or acyclic prefix of the transmission for the second wireless device.Various aspects of phase noise measurement are described in connectionwith FIG. 8 . The measurement may be performed, e.g., by the phase noisecomponent 1550 of the apparatus 1502 in FIG. 15 .

As illustrated at 1406, the repeater may perform a phase noisemeasurement based on an additional signal received from the firstwireless device with the transmission for the repetition to the secondwireless device. Various aspects of phase noise measurement based on anadditional signal are described in connection with FIG. 8-10A. Theadditional signal may include at least one of a DMRS for the repeater, aPTRS, or an additional reference signal for the repeater. The additionalsignal may be multiplexed in at least one of time resources or frequencyresources with a signal for the second wireless device. FIGS. 9A-9Dillustrate various examples of multiplexing the additional signal withthe signal for the UE. The measurement may be performed, e.g., by thephase noise component 1550 of the apparatus 1502 in FIG. 15 .

As illustrated at 1408, the repeater may extract the additional signalfrom the transmission prior to transmitting the repetition of thetransmission to the second wireless device. FIG. 10A illustrates anexample of a repeater extracting the additional reference signal. Theextraction may be performed, e.g., by the transmission component 1534 ofthe apparatus 1502.

FIG. 15 is a diagram 1500 illustrating an example of a hardwareimplementation for an apparatus 1502. The apparatus 1502 may be arepeater, a component of a repeater, or may implement repeaterfunctionality. In some aspects, the apparatus 1502 may include abaseband unit 1504 in an MT component 1528. The apparatus 1502 mayinclude a repeating unit 1506 that is configured to repeatcommunication, e.g., based on an amplify and forward operation, e.g., asdescribed in connection with any of FIGS. 4A-10B. The MT component 1528may receive control signaling, other information, reference signals, andcommunication from a base station 102/180, or from a UE 104. Therepeating unit 1506 may repeat (e.g., amplify and forward) downlink anduplink signals between the UE 104 and the base station 102/180, e.g.,based on control received by the MT component 1528. The baseband unit1504 may communicate through a cellular RF transceiver 1522 with acontrol node, such as a base station 102/180. The baseband unit 1504 mayinclude a computer-readable medium/memory. The baseband unit 1504 isresponsible for general processing, including the execution of softwarestored on the computer-readable medium/memory. The software, whenexecuted by the baseband unit 1504, causes the baseband unit 1504 toperform the various functions described supra. The computer-readablemedium/memory may also be used for storing data that is manipulated bythe baseband unit 1504 when executing software. The baseband unit 1504further includes a reception component 1530, a communication manager1532, and a transmission component 1534. The communication manager 1532includes the one or more illustrated components. The components withinthe communication manager 1532 may be stored in the computer-readablemedium/memory and/or configured as hardware within the baseband unit1504. The baseband unit 1504 may be a component of the repeater 113 andmay include the memory 376 and/or at least one of the TX processor 316,the RX processor 370, and the controller/processor 375.

The apparatus 1502 includes a reception component 1530 that isconfigured to receive from a first wireless device, a transmission forrepetition with at least one second wireless device, e.g., as describedin connection with 1402 in FIGS. 14A and 14B. The apparatus 1502 furtherincludes a transmission component 1534 that transmits the repetition ofthe one or more uplink transmissions to the first wireless device with afrequency shift based on the frequency shifting configuration, e.g., asdescribed in connection with 1312 in FIG. 13B, or that extracts theadditional signal from the transmission, e.g., as in 1408. The apparatus1502 further includes a compensation component 1544 that adjusts therepetition of the transmission, at the repeater to remove a CPE acrosssymbols of the transmission, e.g., as described in connection with 1410and/or transmits the repetition of the transmission to the at least onesecond wireless device with a phase noise compensation, e.g., asdescribed in connection with 1412. The apparatus 1502 further includes arequest component 1546 that receives, from a first wireless device, arequest to report a phase noise in transmissions between the firstwireless device and the repeater for repetition with at least one secondwireless device, e.g., as described in connection with 1302 in FIG. 13Aor 13B. The apparatus 1502 further includes a repeater capabilitycomponent 1548 that transmits an indication that the repeater supportsthe frequency shifting configuration prior to receiving the frequencyshifting configuration, e.g., as described in connection with 1301 inFIG. 13B. The apparatus 1502 further includes a phase noise component1550 that performs a phase noise measurement, e.g., as described inconnection with any of 1304, 1404, or 1406, or that is configured totransmit a report of the phase noise from the repeater to the firstwireless device, e.g., as in 1306.

The apparatus may include additional components that perform each of theblocks of the algorithm in the flowcharts of FIGS. 13A, 13B and/or 14Aor 14B, and any of the aspects performed by the repeater in FIGS.4A-10B. As such, each block in the flowcharts of FIGS. 13A, 13B, 14Aand/or 14B, and any of the aspects performed by the repeater in FIGS.4A-10B may be performed by a component and the apparatus may include oneor more of those components. The components may be one or more hardwarecomponents specifically configured to carry out the statedprocesses/algorithm, implemented by a processor configured to performthe stated processes/algorithm, stored within a computer-readable mediumfor implementation by a processor, or some combination thereof.

As shown, the apparatus 1502 may include a variety of componentsconfigured for various functions. In one configuration, the apparatus1502, and in particular the baseband unit 1504, may include means forreceiving, from a first wireless device, a request for the repeater toreport a phase noise in transmissions between the first wireless deviceand the repeater for repetition with at least one second wirelessdevice; and means for transmitting a report of the phase noise to thefirst wireless device based on the request. The apparatus 1502 mayfurther include means for receiving a frequency shifting configurationfrom the first wireless device; means for receiving, from the firstwireless device, one or more uplink transmissions from a second wirelessdevice; and means for transmitting the repetition of the one or moreuplink transmissions to the first wireless device with a frequency shiftbased on the frequency shifting configuration. The apparatus 1502 mayfurther include means for transmitting, to the first wireless device, anindication that the repeater supports the frequency shiftingconfiguration prior to receiving the frequency shifting configuration.The apparatus 1502 may further include means for measuring the phasenoise based on an additional signal to the repeater with one or moretransmissions for repetition to the second wireless device. Theapparatus 1502 may further include means for transmitting, to the firstwireless device, an uplink repetition of the one or more uplinktransmissions from the second wireless device, the uplink repetitionincluding an additional signal from the repeater. The apparatus 1402 mayfurther include means for receiving, from a first wireless device, atransmission for repetition with at least one second wireless device;and means for transmitting the repetition of the transmission to the atleast one second wireless device with a phase noise compensation. Theapparatus 1402 may further include means for adjusting the repetition ofthe transmission, at the repeater to remove a common phase error (CPE)across symbols of the transmission before transmitting the repetition tothe second wireless device. The apparatus 1402 may further include meansfor performing a phase noise measurement based on the transmission forthe second wireless device. The apparatus 1402 may further include meansfor performing a phase noise measurement based on an additional signalreceived from the first wireless device with the transmission for therepetition to the second wireless device. The apparatus 1402 may furtherinclude means for extracting the additional signal from the transmissionprior to transmitting the repetition of the transmission to the secondwireless device. The means may be one or more of the components of theapparatus 1502 configured to perform the functions recited by the means.As described supra, the apparatus 1502 may include the TX processor 316,the RX processor 370, and the controller/processor 375. As such, in oneconfiguration, the means may be the TX processor 316, the RX processor370, and the controller/processor 375 configured to perform thefunctions recited by the means.

It is understood that the specific order or hierarchy of blocks in theprocesses/flowcharts disclosed is an illustration of example approaches.Based upon design preferences, it is understood that the specific orderor hierarchy of blocks in the processes/flowcharts may be rearranged.Further, some blocks may be combined or omitted. The accompanying methodclaims present elements of the various blocks in a sample order, and arenot meant to be limited to the specific order or hierarchy presented.

The previous description is provided to enable any person skilled in theart to practice the various aspects described herein. Variousmodifications to these aspects will be readily apparent to those skilledin the art, and the generic principles defined herein may be applied toother aspects. Thus, the claims are not intended to be limited to theaspects shown herein, but is to be accorded the full scope consistentwith the language claims, wherein reference to an element in thesingular is not intended to mean “one and only one” unless specificallyso stated, but rather “one or more.” Terms such as “if,” “when,” and“while” should be interpreted to mean “under the condition that” ratherthan imply an immediate temporal relationship or reaction. That is,these phrases, e.g., “when,” do not imply an immediate action inresponse to or during the occurrence of an action, but simply imply thatif a condition is met then an action will occur, but without requiring aspecific or immediate time constraint for the action to occur. The word“exemplary” is used herein to mean “serving as an example, instance, orillustration.” Any aspect described herein as “exemplary” is notnecessarily to be construed as preferred or advantageous over otheraspects. Unless specifically stated otherwise, the term “some” refers toone or more. Combinations such as “at least one of A, B, or C,” “one ormore of A, B, or C,” “at least one of A, B, and C,” “one or more of A,B, and C,” and “A, B, C, or any combination thereof” include anycombination of A, B, and/or C, and may include multiples of A, multiplesof B, or multiples of C. Specifically, combinations such as “at leastone of A, B, or C,” “one or more of A, B, or C,” “at least one of A, B,and C,” “one or more of A, B, and C,” and “A, B, C, or any combinationthereof” may be A only, B only, C only, A and B, A and C, B and C, or Aand B and C, where any such combinations may contain one or more memberor members of A, B, or C. All structural and functional equivalents tothe elements of the various aspects described throughout this disclosurethat are known or later come to be known to those of ordinary skill inthe art are expressly incorporated herein by reference and are intendedto be encompassed by the claims. Moreover, nothing disclosed herein isintended to be dedicated to the public regardless of whether suchdisclosure is explicitly recited in the claims. The words “module,”“mechanism,” “element,” “device,” and the like may not be a substitutefor the word “means.” As such, no claim element is to be construed as ameans plus function unless the element is expressly recited using thephrase “means for.”

The following aspects are illustrative only and may be combined withother aspects or teachings described herein, without limitation.

Aspect 1 is a method of wireless communication at a first wirelessdevice, comprising: transmitting one or more transmissions for a secondwireless device to a repeater for repetition to the second wirelessdevice; adjusting a repeater operation based on a phase noise intransmission between the first wireless device and the repeater; andcommunicating with at least one of the repeater or the second wirelessdevice based on the adjusted repeater operation.

In aspect 2, the method of aspect 1 further includes that the firstwireless device is a base station and the second wireless device is aUE.

In aspect 3, the method of aspect 1 further includes that the firstwireless device is a first UE and the second wireless device is a secondUE.

In aspect 4, the method of any of aspects 1-3 further includes that theadjusting the repeater operation includes at least one of stoppingcommunication with the second wireless device via the repeater orcommunicating with the second wireless device via a different repeater.

In aspect 5, the method of any of aspects 1-3 further includes that theadjusting the repeater operation includes configuring the repeater witha frequency shifting configuration to shift a signal at the repeaterfrom a first frequency to a second frequency.

In aspect 6, the method of any of aspect 5 further includes thatreceiving, from the repeater, an indication that the repeater supportsthe frequency shifting configuration prior to configuring the repeater.

In aspect 7, the method of any of aspects 1-6 further includes thatmeasuring the phase noise in the transmission between the first wirelessdevice and the repeater, wherein the first wireless device adjusts therepeater operation based on a measured phase noise being higher than athreshold.

In aspect 8, the method of aspect 7 further includes that receivingmultiple signals from the second wireless device that are repeated bythe repeater, wherein measuring the phase noise includes measuring achange in a phase offset over time in multiple signals from at least thesecond wireless device.

In aspect 9, the method of aspect 7 further includes that measuring thephase noise includes measuring the change in the phase offset over thetime for the multiple signals from multiple other wireless devicescommunicating with the first wireless device.

In aspect 10, the method of any of aspects 1-9 further includesreceiving an indication of the phase noise from the repeater, whereinthe first wireless device adjusts the repeater operation based on ameasured phase noise being higher than a threshold.

In aspect 11, the method of aspect 10 further includes transmitting arequest for the repeater to report the phase noise, the indication beingreceived in response to the request.

In aspect 12, the method of aspect 11 further includes that the requestindicates for the repeater to report the phase noise if the phase noiseexceeds a phase noise threshold.

In aspect 13, the method of any of aspects 1-12 further includestransmitting an additional signal to the repeater with the one or moretransmissions for the repetition to the second wireless device, theadditional signal including at least one of a DMRS, a PTRS, or anadditional reference signal for the repeater, wherein the additionalsignal is multiplexed in at least one of time resources or frequencyresources with a signal for the second wireless device.

In aspect 14, the method of any of aspects 1-13 further includesreceiving a reference signal from the repeater, the reference signalmultiplexed in the repetition of a signal from the second wirelessdevice, wherein the phase noise is based the reference signal.

Aspect 15 is an apparatus for wireless communication comprising means toperform the method of any of aspects 1-14.

In aspect 16, the apparatus of aspect 15 further includes at least oneof an antenna or a transceiver coupled to the at least one antenna andthe means to perform the method of any of aspects 1-20.

Aspect 17 is an apparatus for wireless communication comprising memoryand at least one processor coupled to the memory, the memory and the atleast one processor configured to perform the method of any of aspects1-14.

In aspect 18, the apparatus of aspect 17 further includes at least oneof an antenna or a transceiver coupled to the at least one antenna andthe at least one processor.

Aspect 19 is a non-transitory computer-readable storage medium storingcomputer executable code, the code when executed by a processor causesthe processor to perform the method of any of aspects 1-14.

Aspect 20 is a method of wireless communication at a repeater,comprising: receiving, from a first wireless device, a request for therepeater to report a phase noise in transmissions between the firstwireless device and the repeater for repetition with a second wirelessdevice; and transmitting a report of the phase noise to the firstwireless device based on the request.

In aspect 21, the method of aspect 20 further includes that the firstwireless device is a base station and the second wireless device is aUE.

In aspect 22, the method of aspect 20 further includes that the firstwireless device is a first UE and the second wireless device is a secondUE.

In aspect 23, the method of any of aspects 20-23 further includes thatthe request indicates for the repeater to report the phase noise if thephase noise exceeds a phase noise threshold, the report beingtransmitted based on the phase noise exceeding the phase noisethreshold.

In aspect 24, the method of any of aspects 20-23 further includesreceiving a frequency shifting configuration from the first wirelessdevice; receiving one or more signals from one of the first wirelessdevice or the second wireless device; and transmitting the repetition ofthe one or more signals to the other of the first wireless device or thesecond wireless device with a frequency shift based on the frequencyshifting configuration.

In aspect 25, the method of aspect 24 further includes transmitting, tothe first wireless device, an indication that the repeater supports thefrequency shifting configuration prior to receiving the frequencyshifting configuration.

In aspect 26, the method of any of aspects 20-25 further includesmeasuring the phase noise based on an additional signal to the repeaterwith one or more transmissions for repetition to the at least one secondwireless device.

In aspect 27, the method of aspect 26 further includes that theadditional signal includes at least one of a DMRS for the repeater, aPTRS, or an additional reference signal for the repeater.

In aspect 28, the method of aspect 26 or 27 further includes that theadditional signal is multiplexed in at least one of time resources orfrequency resources with at least one transmission from the firstwireless device for the second wireless device.

In aspect 29, the method of any of aspects 20-28 further includestransmitting, to the first wireless device, a signal repetition of theone or more signals from the second wireless device including anadditional signal from the repeater, wherein the additional signalincludes at least one of a DMRS for the first wireless device, a PTRS,or an additional reference signal for the first wireless device, theadditional signal being multiplexed in at least one of time resources orfrequency resources with a signal from the second wireless device.

Aspect 30 is an apparatus for wireless communication comprising means toperform the method of any of aspects 20-29.

In aspect 31, the apparatus of aspect 30 further includes at least oneof an antenna or a transceiver coupled to the at least one antenna andthe means to perform the method of any of aspects 20-29.

Aspect 32 is an apparatus for wireless communication comprising memoryand at least one processor coupled to the memory, the at least oneprocessor configured to perform the method of any of aspects 20-29.

In aspect 33, the apparatus of aspect 30 further includes at least oneof an antenna or a transceiver coupled to the at least one antenna andthe at least one processor.

Aspect 34 is a non-transitory computer-readable storage medium storingcomputer executable code, the code when executed by a processor causesthe processor to perform the method of any of aspects 20-29.

Aspect 35 is a method of wireless communication at a repeater,comprising: receiving, from a first wireless device, a transmission forrepetition with a second wireless device; and transmitting therepetition of the transmission to the second wireless device with aphase noise compensation.

In aspect 36, the method of aspect 35 further includes that the firstwireless device is a base station and the second wireless device is aUE.

In aspect 37, the method of aspect 35 further includes that the firstwireless device is a first UE and the second wireless device is a secondUE.

In aspect 38, the method of any of aspects 35-37 further includesadjusting the repetition of the transmission, at the repeater to removea CPE across symbols of the transmission before transmitting therepetition to the second wireless device.

In aspect 39, the method of aspect 38 further includes performing aphase noise measurement based on the transmission for the secondwireless device.

In aspect 40, the method of aspect 38 or 39 further includes that thephase noise measurement is based on at least one of a DMRS or a cyclicprefix of the transmission for the second wireless device.

In aspect 41, the method of any of aspects 35-40 further includesperforming a phase noise measurement based on an additional signalreceived from the first wireless device with the transmission for therepetition to the second wireless device, wherein the additional signalincludes at least one of a demodulation reference signal (DMRS) for therepeater, a phase tracking reference signal (PTRS), or an additionalreference signal for the repeater.

In aspect 42, the method of aspect 41 further includes that theadditional signal is multiplexed in at least one of time resources orfrequency resources with a signal for the second wireless device.

In aspect 43, the method of aspect 41 or 42 further includes extractingthe additional signal from the transmission prior to transmitting therepetition of the transmission to the second wireless device.

Aspect 44 is an apparatus for wireless communication comprising means toperform the method of any of aspects 35-43.

In aspect 45, the apparatus of aspect 44 further includes at least oneof an antenna or a transceiver coupled to the at least one antenna andthe means to perform the method of any of aspects 35-43.

Aspect 46 is an apparatus for wireless communication comprising memoryand at least one processor coupled to the memory, the at least oneprocessor configured to perform the method of any of aspects 35-43.

In aspect 47, the apparatus of aspect 46 further includes at least oneof an antenna or a transceiver coupled to the at least one antenna andthe at least one processor.

Aspect 48 is a non-transitory computer-readable storage medium storingcomputer executable code, the code when executed by a processor causesthe processor to perform the method of any of aspects 35-43.

What is claimed is:
 1. An apparatus for wireless communication at arepeater, comprising: memory; and at least one processor coupled to thememory and configured to cause the repeater to: receive, from a firstwireless device, a request for the repeater to report a phase noise intransmissions between the first wireless device and the repeater forrepetition with a second wireless device; and transmit a report of thephase noise to the first wireless device based on the request.
 2. Theapparatus of claim 1, further comprising: at least one of an antenna ora transceiver, wherein the first wireless device is a base station andthe second wireless device is a user equipment (UE), or the firstwireless device is a first UE and the second wireless device is a secondUE.
 3. The apparatus of claim 1, wherein the request indicates for therepeater to report the phase noise if the phase noise exceeds a phasenoise threshold, the report being based on the phase noise exceeding thephase noise threshold.
 4. The apparatus of claim 1, wherein the at leastone processor is further configured to cause the repeater to: receive afrequency shifting configuration from the first wireless device; receiveone or more signals from one of the first wireless device or the secondwireless device; and transmit the repetition of the one or more signalsto another of the first wireless device or the second wireless devicewith a frequency shift based on the frequency shifting configuration. 5.The apparatus of claim 4, wherein the at least one processor is furtherconfigured to cause the repeater to: transmit, to the first wirelessdevice, an indication that the repeater supports the frequency shiftingconfiguration prior to receiving the frequency shifting configuration.6. The apparatus of claim 1, wherein the at least one processor isfurther configured to cause the repeater to: measure the phase noisebased on an additional signal to the repeater with one or moretransmissions for the repetition to the second wireless device.
 7. Theapparatus of claim 6, wherein the additional signal includes at leastone of a demodulation reference signal (DMRS) for the repeater, a phasetracking reference signal (PTRS), or an additional reference signal forthe repeater.
 8. The apparatus of claim 6, wherein the additional signalis multiplexed in at least one of time resources or frequency resourceswith at least one transmission from the first wireless device for thesecond wireless device.
 9. The apparatus of claim 6, wherein the atleast one processor is further configured to cause the repeater to:transmit, to the first wireless device, a signal repetition of the oneor more transmissions from the second wireless device including theadditional signal from the repeater, wherein the additional signalincludes at least one of a demodulation reference signal (DMRS) for thefirst wireless device, a phase tracking reference signal (PTRS), or anadditional reference signal for the first wireless device, theadditional signal being multiplexed in at least one of time resources orfrequency resources with a signal from the second wireless device. 10.An apparatus for wireless communication at a repeater, comprising:memory; and at least one processor coupled to the memory and configuredto cause the repeater to: receive, from a first wireless device, atransmission for repetition with a second wireless device; and transmitthe repetition of the transmission to the second wireless device with aphase noise compensation.
 11. The apparatus of claim 10, furthercomprising: at least one of an antenna or a transceiver, wherein thefirst wireless device is a base station and the second wireless deviceis a user equipment (UE), or the first wireless device is a first UE andthe second wireless device is a second UE.
 12. The apparatus of claim10, wherein the at least one processor is further configured to causethe repeater to: adjust the repetition of the transmission, at therepeater to remove a common phase error (CPE) across symbols of thetransmission before transmitting the repetition to the second wirelessdevice.
 13. The apparatus of claim 12, wherein the at least oneprocessor is further configured to cause the repeater to: perform aphase noise measurement based on the transmission for the secondwireless device.
 14. The apparatus of claim 13, wherein the phase noisemeasurement is based on at least one of a demodulation reference signal(DMRS) or a cyclic prefix of the transmission for the second wirelessdevice.
 15. The apparatus of claim 10, wherein the at least oneprocessor is further configured to cause the repeater to: perform aphase noise measurement based on an additional signal received from thefirst wireless device with the transmission for the repetition to thesecond wireless device, wherein the additional signal includes at leastone of a demodulation reference signal (DMRS) for the repeater, a phasetracking reference signal (PTRS), or an additional reference signal forthe repeater.
 16. The apparatus of claim 15, wherein the additionalsignal is multiplexed in at least one of time resources or frequencyresources with a signal for the second wireless device.
 17. Theapparatus of claim 15, wherein the at least one processor is furtherconfigured to cause the repeater to: extract the additional signal fromthe transmission prior to transmitting the repetition of thetransmission to the second wireless device.
 18. A method of wirelesscommunication at a repeater, comprising: receiving, from a firstwireless device, a request for the repeater to report a phase noise intransmissions between the first wireless device and the repeater forrepetition with a second wireless device; and transmitting a report ofthe phase noise to the first wireless device based on the request. 19.The method of claim 18, wherein the first wireless device is a basestation and the second wireless device is a user equipment (UE), or thefirst wireless device is a first UE and the second wireless device is asecond UE, and wherein the request indicates for the repeater to reportthe phase noise if the phase noise exceeds a phase noise threshold, thereport being based on the phase noise exceeding the phase noisethreshold.
 20. The method of claim 18, further comprising: receiving afrequency shifting configuration from the first wireless device;receiving one or more signals from one of the first wireless device orthe second wireless device; and transmitting the repetition of the oneor more signals to another of the first wireless device or the secondwireless device with a frequency shift based on the frequency shiftingconfiguration.
 21. The method of claim 20, further comprising:transmitting, to the first wireless device, an indication that therepeater supports the frequency shifting configuration prior toreceiving the frequency shifting configuration.
 22. The method of claim18, further comprising: measuring the phase noise based on an additionalsignal to the repeater with one or more transmissions for the repetitionto the second wireless device.
 23. The method of claim 22, wherein theadditional signal includes at least one of a demodulation referencesignal (DMRS) for the repeater, a phase tracking reference signal(PTRS), or an additional reference signal for the repeater.
 24. Themethod of claim 22, wherein the additional signal is multiplexed in atleast one of time resources or frequency resources with at least onetransmission from the first wireless device for the second wirelessdevice.
 25. The method of claim 22, further comprising: transmitting, tothe first wireless device, a signal repetition of the one or moretransmissions from the second wireless device including the additionalsignal from the repeater, wherein the additional signal includes atleast one of a demodulation reference signal (DMRS) for the firstwireless device, a phase tracking reference signal (PTRS), or anadditional reference signal for the first wireless device, theadditional signal being multiplexed in at least one of time resources orfrequency resources with a signal from the second wireless device.
 26. Amethod for wireless communication at a repeater, comprising: receiving,from a first wireless device, a transmission for repetition with asecond wireless device; and transmitting the repetition of thetransmission to the second wireless device with a phase noisecompensation.
 27. The method of claim 26, wherein the first wirelessdevice is a base station and the second wireless device is a userequipment (UE), or the first wireless device is a first UE and thesecond wireless device is a second UE, the method further comprising:adjusting the repetition of the transmission, at the repeater to removea common phase error (CPE) across symbols of the transmission beforetransmitting the repetition to the second wireless device.
 28. Themethod of claim 27, further comprising: performing a phase noisemeasurement based on the transmission for the second wireless device,wherein the phase noise measurement is based on at least one of ademodulation reference signal (DMRS) or a cyclic prefix of thetransmission for the second wireless device.
 29. The method of claim 26,further comprising: performing a phase noise measurement based on anadditional signal received from the first wireless device with thetransmission for the repetition to the second wireless device, whereinthe additional signal includes at least one of a demodulation referencesignal (DMRS) for the repeater, a phase tracking reference signal(PTRS), or an additional reference signal for the repeater, wherein theadditional signal is multiplexed in at least one of time resources orfrequency resources with a signal for the second wireless device. 30.The method of claim 29, further comprising: extracting the additionalsignal from the transmission prior to transmitting the repetition of thetransmission to the second wireless device.